123231132012 has 48 divisors (see below), whose sum is σ = 294188781824. Its totient is φ = 40136040000.

The previous prime is 123231132001. The next prime is 123231132019. The reversal of 123231132012 is 210231132321.

It is a self number, because there is not a number n which added to its sum of digits gives 123231132012.

It is not an unprimeable number, because it can be changed into a prime (123231132019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446914 + ... + 667977.

Almost surely, 2^123231132012 is an apocalyptic number.

123231132012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123231132012 is an abundant number, since it is smaller than the sum of its proper divisors (170957649812).

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

123231132012 is a wasteful number, since it uses less digits than its factorization.

123231132012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115110 (or 1115108 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123231132012 its reverse (210231132321), we get a palindrome (333462264333).

The spelling of 123231132012 in words is "one hundred twenty-three billion, two hundred thirty-one million, one hundred thirty-two thousand, twelve".