213112012131 has 6 divisors (see below), whose sum is σ = 307828461980. Its totient is φ = 142074674748.

The previous prime is 213112012093. The next prime is 213112012163. The reversal of 213112012131 is 131210211312.

213112012131 is a `hidden beast` number, since 21 + 311 + 201 + 2 + 131 = 666.

It is not a de Polignac number, because 213112012131 - 2⁶ = 213112012067 is a prime.

It is a super-2 number, since 2×213112012131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213112012331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11839556221 + ... + 11839556238.

Almost surely, 2^213112012131 is an apocalyptic number.

213112012131 is a deficient number, since it is larger than the sum of its proper divisors (94716449849).

213112012131 is a wasteful number, since it uses less digits than its factorization.

213112012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23679112465 (or 23679112462 counting only the distinct ones).

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

Adding to 213112012131 its reverse (131210211312), we get a palindrome (344322223443).

The spelling of 213112012131 in words is "two hundred thirteen billion, one hundred twelve million, twelve thousand, one hundred thirty-one".