1231111312432 has 40 divisors (see below), whose sum is σ = 2526345999936. Its totient is φ = 579172770816.

The previous prime is 1231111312411. The next prime is 1231111312447. The reversal of 1231111312432 is 2342131111321.

It is a junction number, because it is equal to n+sod(n) for n = 1231111312397 and 1231111312406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232338 + ... + 1586254.

Almost surely, 2^{1231111312432} is an apocalyptic number.

It is an amenable number.

1231111312432 is an abundant number, since it is smaller than the sum of its proper divisors (1295234687504).

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

1231111312432 is a wasteful number, since it uses less digits than its factorization.

1231111312432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357285 (or 1357279 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

Adding to 1231111312432 its reverse (2342131111321), we get a palindrome (3573242423753).

The spelling of 1231111312432 in words is "one trillion, two hundred thirty-one billion, one hundred eleven million, three hundred twelve thousand, four hundred thirty-two".