11212031131 has 16 divisors (see below), whose sum is σ = 13582992384. Its totient is φ = 9034671744.

The previous prime is 11212031123. The next prime is 11212031141. The reversal of 11212031131 is 13113021211.

It is a happy number.

It is not a de Polignac number, because 11212031131 - 2³ = 11212031123 is a prime.

It is a super-2 number, since 2×11212031131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11212031141) 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, 51726 + ... + 158428.

It is an arithmetic number, because the mean of its divisors is an integer number (848937024).

Almost surely, 2^11212031131 is an apocalyptic number.

11212031131 is a deficient number, since it is larger than the sum of its proper divisors (2370961253).

11212031131 is a wasteful number, since it uses less digits than its factorization.

11212031131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107610.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11212031131 its reverse (13113021211), we get a palindrome (24325052342).

The spelling of 11212031131 in words is "eleven billion, two hundred twelve million, thirty-one thousand, one hundred thirty-one".