1231313220032 has 56 divisors (see below), whose sum is σ = 2830695193056. Its totient is φ = 520476807168.

The previous prime is 1231313220019. The next prime is 1231313220043. The reversal of 1231313220032 is 2300223131321.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1231313220032² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 18792413 + ... + 18857820.

Almost surely, 2^{1231313220032} is an apocalyptic number.

It is an amenable number.

1231313220032 is an abundant number, since it is smaller than the sum of its proper divisors (1599381973024).

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

1231313220032 is an equidigital number, since it uses as much as digits as its factorization.

1231313220032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37650325 (or 37650315 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1231313220032 its reverse (2300223131321), we get a palindrome (3531536351353).

The spelling of 1231313220032 in words is "one trillion, two hundred thirty-one billion, three hundred thirteen million, two hundred twenty thousand, thirty-two".