123051312 has 60 divisors (see below), whose sum is σ = 357138600. Its totient is φ = 41015808.

The previous prime is 123051289. The next prime is 123051317. The reversal of 123051312 is 213150321.

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

It is not an unprimeable number, because it can be changed into a prime (123051317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11937 + ... + 19712.

It is an arithmetic number, because the mean of its divisors is an integer number (5952310).

Almost surely, 2^123051312 is an apocalyptic number.

123051312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123051312 is an abundant number, since it is smaller than the sum of its proper divisors (234087288).

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

123051312 is an equidigital number, since it uses as much as digits as its factorization.

123051312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31672 (or 31654 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 123051312 is about 11092.8495888117. The cubic root of 123051312 is about 497.3881293539.

Subtracting 123051312 from its reverse (213150321), we obtain a palindrome (90099009).

The spelling of 123051312 in words is "one hundred twenty-three million, fifty-one thousand, three hundred twelve".