123010920 has 64 divisors (see below), whose sum is σ = 410040000. Its totient is φ = 32802624.

The previous prime is 123010889. The next prime is 123010939. The reversal of 123010920 is 29010321.

It is a happy number.

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 = 123010893 and 123010902.

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 15 ways as a sum of consecutive naturals, for example, 55870 + ... + 58029.

It is an arithmetic number, because the mean of its divisors is an integer number (6406875).

Almost surely, 2^123010920 is an apocalyptic number.

123010920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123010920 is an abundant number, since it is smaller than the sum of its proper divisors (287029080).

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

123010920 is a wasteful number, since it uses less digits than its factorization.

123010920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113919 (or 113909 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 123010920 is about 11091.0288071035. The cubic root of 123010920 is about 497.3337002987. Note that the first 3 decimals are identical.

The spelling of 123010920 in words is "one hundred twenty-three million, ten thousand, nine hundred twenty".