123010021312 has 112 divisors (see below), whose sum is σ = 262800023040. Its totient is φ = 56943931392.

The previous prime is 123010021273. The next prime is 123010021333. The reversal of 123010021312 is 213120010321.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55836403 + ... + 55838605.

Almost surely, 2^123010021312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123010021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131400011520).

123010021312 is an abundant number, since it is smaller than the sum of its proper divisors (139790001728).

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

123010021312 is a wasteful number, since it uses less digits than its factorization.

123010021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3258 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123010021312 its reverse (213120010321), we get a palindrome (336130031633).

The spelling of 123010021312 in words is "one hundred twenty-three billion, ten million, twenty-one thousand, three hundred twelve".