213112212131 has 12 divisors (see below), whose sum is σ = 266975739072. Its totient is φ = 168616255248.

The previous prime is 213112212127. The next prime is 213112212133. The reversal of 213112212131 is 131212211312.

It is not a de Polignac number, because 213112212131 - 2² = 213112212127 is a prime.

It is a super-2 number, since 2×213112212131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213112212133) 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, 167277395 + ... + 167278668.

It is an arithmetic number, because the mean of its divisors is an integer number (22247978256).

Almost surely, 2^213112212131 is an apocalyptic number.

213112212131 is a deficient number, since it is larger than the sum of its proper divisors (53863526941).

213112212131 is a wasteful number, since it uses less digits than its factorization.

213112212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334556090 (or 334556083 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

Adding to 213112212131 its reverse (131212211312), we get a palindrome (344324423443).

The spelling of 213112212131 in words is "two hundred thirteen billion, one hundred twelve million, two hundred twelve thousand, one hundred thirty-one".