123013431213512 has 128 divisors (see below), whose sum is σ = 275930630922240. Its totient is φ = 50321633406720.

The previous prime is 123013431213487. The next prime is 123013431213581. The reversal of 123013431213512 is 215312134310321.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20655587 + ... + 25936077.

It is an arithmetic number, because the mean of its divisors is an integer number (2155708054080).

Almost surely, 2^{123013431213512} 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 123013431213512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137965315461120).

123013431213512 is an abundant number, since it is smaller than the sum of its proper divisors (152917199708728).

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

123013431213512 is a wasteful number, since it uses less digits than its factorization.

123013431213512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280771 (or 5280767 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 123013431213512 its reverse (215312134310321), we get a palindrome (338325565523833).

The spelling of 123013431213512 in words is "one hundred twenty-three trillion, thirteen billion, four hundred thirty-one million, two hundred thirteen thousand, five hundred twelve".