1231110011131 has 64 divisors (see below), whose sum is σ = 1670317479936. Its totient is φ = 876225024000.

The previous prime is 1231110011119. The next prime is 1231110011137. The reversal of 1231110011131 is 1311100111321.

It is a cyclic number.

It is not a de Polignac number, because 1231110011131 - 2²⁷ = 1230975793403 is a prime.

It is a super-2 number, since 2×1231110011131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231110011137) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 268623066 + ... + 268627648.

It is an arithmetic number, because the mean of its divisors is an integer number (26098710624).

Almost surely, 2^{1231110011131} is an apocalyptic number.

1231110011131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231110011131 is a deficient number, since it is larger than the sum of its proper divisors (439207468805).

1231110011131 is a wasteful number, since it uses less digits than its factorization.

1231110011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7372.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1231110011131 its reverse (1311100111321), we get a palindrome (2542210122452).

It can be divided in two parts, 1 and 231110011131, that added together give a palindrome (231110011132).

The spelling of 1231110011131 in words is "one trillion, two hundred thirty-one billion, one hundred ten million, eleven thousand, one hundred thirty-one".