123109312 has 28 divisors (see below), whose sum is σ = 244774720. Its totient is φ = 61433856.

The previous prime is 123109289. The next prime is 123109331. The reversal of 123109312 is 213901321.

It is a super-2 number, since 2×123109312² = 30311805402226688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37264 + ... + 40432.

Almost surely, 2^123109312 is an apocalyptic number.

It is an amenable number.

123109312 is a deficient number, since it is larger than the sum of its proper divisors (121665408).

123109312 is an equidigital number, since it uses as much as digits as its factorization.

123109312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3788 (or 3778 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 123109312 is about 11095.4635775167. The cubic root of 123109312 is about 497.4662647259.

The spelling of 123109312 in words is "one hundred twenty-three million, one hundred nine thousand, three hundred twelve".