123010020 has 144 divisors (see below), whose sum is σ = 429287040. Its totient is φ = 27929088.

The previous prime is 123010007. The next prime is 123010033. The reversal of 123010020 is 20010321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123010007) and next prime (123010033).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 123009984 and 123010011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 293371 + ... + 293789.

It is an arithmetic number, because the mean of its divisors is an integer number (2981160).

Almost surely, 2^123010020 is an apocalyptic number.

123010020 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 123010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214643520).

123010020 is an abundant number, since it is smaller than the sum of its proper divisors (306277020).

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

123010020 is a wasteful number, since it uses less digits than its factorization.

123010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 123010020 is about 11090.9882336968. The cubic root of 123010020 is about 497.3324873944.

Adding to 123010020 its reverse (20010321), we get a palindrome (143020341).

The spelling of 123010020 in words is "one hundred twenty-three million, ten thousand, twenty".