1231112200131 has 40 divisors (see below), whose sum is σ = 2093485515264. Its totient is φ = 713688220080.

The previous prime is 1231112200033. The next prime is 1231112200133. The reversal of 1231112200131 is 1310022111321.

1231112200131 is a `hidden beast` number, since 1 + 2 + 311 + 1 + 220 + 0 + 131 = 666.

It is not a de Polignac number, because 1231112200131 - 2⁹ = 1231112199619 is a prime.

It is a super-2 number, since 2×1231112200131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231112200133) 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 39 ways as a sum of consecutive naturals, for example, 30016891 + ... + 30057876.

Almost surely, 2^{1231112200131} is an apocalyptic number.

1231112200131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231112200131 is a deficient number, since it is larger than the sum of its proper divisors (862373315133).

1231112200131 is a wasteful number, since it uses less digits than its factorization.

1231112200131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60074813 (or 60074804 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1231112200131 its reverse (1310022111321), we get a palindrome (2541134311452).

The spelling of 1231112200131 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, two hundred thousand, one hundred thirty-one".