123031013312 has 28 divisors (see below), whose sum is σ = 244391221656. Its totient is φ = 61452122880.

The previous prime is 123031013297. The next prime is 123031013317. The reversal of 123031013312 is 213310130321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031013317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 927743 + ... + 1052030.

Almost surely, 2^123031013312 is an apocalyptic number.

It is an amenable number.

123031013312 is a deficient number, since it is larger than the sum of its proper divisors (121360208344).

123031013312 is an equidigital number, since it uses as much as digits as its factorization.

123031013312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980756 (or 1980746 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123031013312 its reverse (213310130321), we get a palindrome (336341143633).

The spelling of 123031013312 in words is "one hundred twenty-three billion, thirty-one million, thirteen thousand, three hundred twelve".