11312232131 has 2 divisors, whose sum is σ = 11312232132. Its totient is φ = 11312232130.

The previous prime is 11312232121. The next prime is 11312232143. The reversal of 11312232131 is 13123221311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11312232131 - 2⁶ = 11312232067 is a prime.

It is a super-2 number, since 2×11312232131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11312232121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656116065 + 5656116066.

It is an arithmetic number, because the mean of its divisors is an integer number (5656116066).

Almost surely, 2^11312232131 is an apocalyptic number.

11312232131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312232131 is an equidigital number, since it uses as much as digits as its factorization.

11312232131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

Adding to 11312232131 its reverse (13123221311), we get a palindrome (24435453442).

The spelling of 11312232131 in words is "eleven billion, three hundred twelve million, two hundred thirty-two thousand, one hundred thirty-one".