1231200313031 has 16 divisors (see below), whose sum is σ = 1342944543360. Its totient is φ = 1121895290880.

The previous prime is 1231200312997. The next prime is 1231200313043. The reversal of 1231200313031 is 1303130021321.

It is a de Polignac number, because none of the positive numbers 2^k-1231200313031 is a prime.

It is a super-2 number, since 2×1231200313031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231200312994 and 1231200313012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231200313081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5477741 + ... + 5698073.

It is an arithmetic number, because the mean of its divisors is an integer number (83934033960).

Almost surely, 2^{1231200313031} is an apocalyptic number.

1231200313031 is a deficient number, since it is larger than the sum of its proper divisors (111744230329).

1231200313031 is a wasteful number, since it uses less digits than its factorization.

1231200313031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225866.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1231200313031 its reverse (1303130021321), we get a palindrome (2534330334352).

The spelling of 1231200313031 in words is "one trillion, two hundred thirty-one billion, two hundred million, three hundred thirteen thousand, thirty-one".