213113211131 has 4 divisors (see below), whose sum is σ = 225649282392. Its totient is φ = 200577139872.

The previous prime is 213113211083. The next prime is 213113211149. The reversal of 213113211131 is 131112311312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213113211131 - 2¹⁸ = 213112948987 is a prime.

It is a super-2 number, since 2×213113211131² (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 (213113211431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6268035605 + ... + 6268035638.

It is an arithmetic number, because the mean of its divisors is an integer number (56412320598).

Almost surely, 2^213113211131 is an apocalyptic number.

213113211131 is a deficient number, since it is larger than the sum of its proper divisors (12536071261).

213113211131 is a wasteful number, since it uses less digits than its factorization.

213113211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12536071260.

The product of its digits is 108, while the sum is 20.

Adding to 213113211131 its reverse (131112311312), we get a palindrome (344225522443).

The spelling of 213113211131 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred eleven thousand, one hundred thirty-one".