11211012131 has 16 divisors (see below), whose sum is σ = 12546551808. Its totient is φ = 9930148800.

The previous prime is 11211012119. The next prime is 11211012133. The reversal of 11211012131 is 13121011211.

It is a de Polignac number, because none of the positive numbers 2^k-11211012131 is a prime.

It is a super-2 number, since 2×11211012131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211012133) 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, 66671 + ... + 163911.

It is an arithmetic number, because the mean of its divisors is an integer number (784159488).

Almost surely, 2^11211012131 is an apocalyptic number.

11211012131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11211012131 is a deficient number, since it is larger than the sum of its proper divisors (1335539677).

11211012131 is a wasteful number, since it uses less digits than its factorization.

11211012131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97522.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11211012131 its reverse (13121011211), we get a palindrome (24332023342).

The spelling of 11211012131 in words is "eleven billion, two hundred eleven million, twelve thousand, one hundred thirty-one".