123322120020 has 144 divisors (see below), whose sum is σ = 411063726528. Its totient is φ = 29677985280.

The previous prime is 123322119979. The next prime is 123322120021. The reversal of 123322120020 is 20021223321.

123322120020 is a `hidden beast` number, since 123 + 322 + 1 + 200 + 20 = 666.

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 = 123322119975 and 123322120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123322120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43947 + ... + 498573.

It is an arithmetic number, because the mean of its divisors is an integer number (2854609212).

Almost surely, 2^123322120020 is an apocalyptic number.

123322120020 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 123322120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205531863264).

123322120020 is an abundant number, since it is smaller than the sum of its proper divisors (287741606508).

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

123322120020 is a wasteful number, since it uses less digits than its factorization.

123322120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454790 (or 454785 counting only the distinct ones).

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

Adding to 123322120020 its reverse (20021223321), we get a palindrome (143343343341).

It can be divided in two parts, 123322 and 120020, that added together give a palindrome (243342).

The spelling of 123322120020 in words is "one hundred twenty-three billion, three hundred twenty-two million, one hundred twenty thousand, twenty".