213131131312 has 40 divisors (see below), whose sum is σ = 450792285840. Its totient is φ = 96810996480.

The previous prime is 213131131309. The next prime is 213131131313.

213131131312 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (213131131313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160987 + ... + 672442.

It is an arithmetic number, because the mean of its divisors is an integer number (11269807146).

Almost surely, 2^213131131312 is an apocalyptic number.

213131131312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

213131131312 is an abundant number, since it is smaller than the sum of its proper divisors (237661154528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213131131312 is a wasteful number, since it uses less digits than its factorization.

213131131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834901 (or 834895 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

Multiplying 213131131312 by its sum of digits (22), we get a palindrome (4688884888864).

It can be divided in two parts, 213131 and 131312, that added together give a palindrome (344443).

The spelling of 213131131312 in words is "two hundred thirteen billion, one hundred thirty-one million, one hundred thirty-one thousand, three hundred twelve".