123021202300020 has 144 divisors (see below), whose sum is σ = 383270978654928. Its totient is φ = 31917253754880.

The previous prime is 123021202299953. The next prime is 123021202300027. The reversal of 123021202300020 is 20003202120321.

123021202300020 is a `hidden beast` number, since 12 + 302 + 120 + 230 + 0 + 0 + 2 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 2058731389584 + 120962470910436 = 1434828^2 + 10998294^2 .

It is a super-2 number, since 2×123021202300020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123021202299966 and 123021202300002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021202300027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122449972 + ... + 123450548.

It is an arithmetic number, because the mean of its divisors is an integer number (2661604018437).

Almost surely, 2^{123021202300020} is an apocalyptic number.

123021202300020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123021202300020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191635489327464).

123021202300020 is an abundant number, since it is smaller than the sum of its proper divisors (260249776354908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123021202300020 is a wasteful number, since it uses less digits than its factorization.

123021202300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019090 (or 1019085 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 123021202300020 its reverse (20003202120321), we get a palindrome (143024404420341).

The spelling of 123021202300020 in words is "one hundred twenty-three trillion, twenty-one billion, two hundred two million, three hundred thousand, twenty".