11311402131 has 12 divisors (see below), whose sum is σ = 16371181008. Its totient is φ = 7525939824.

The previous prime is 11311402117. The next prime is 11311402159. The reversal of 11311402131 is 13120411311.

It is a happy number.

11311402131 is a `hidden beast` number, since 1 + 131 + 1 + 402 + 131 = 666.

It is not a de Polignac number, because 11311402131 - 2¹¹ = 11311400083 is a prime.

It is a super-2 number, since 2×11311402131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11311402331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1244800 + ... + 1253853.

It is an arithmetic number, because the mean of its divisors is an integer number (1364265084).

Almost surely, 2^11311402131 is an apocalyptic number.

11311402131 is a deficient number, since it is larger than the sum of its proper divisors (5059778877).

11311402131 is a wasteful number, since it uses less digits than its factorization.

11311402131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499162 (or 2499159 counting only the distinct ones).

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

Adding to 11311402131 its reverse (13120411311), we get a palindrome (24431813442).

The spelling of 11311402131 in words is "eleven billion, three hundred eleven million, four hundred two thousand, one hundred thirty-one".