213111112331 has 12 divisors (see below), whose sum is σ = 232181055288. Its totient is φ = 195511065984.

The previous prime is 213111112321. The next prime is 213111112339. The reversal of 213111112331 is 133211111312.

It is not a de Polignac number, because 213111112331 - 2³⁴ = 195931243147 is a prime.

It is a super-2 number, since 2×213111112331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213111112339) 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, 3840590 + ... + 3895683.

It is an arithmetic number, because the mean of its divisors is an integer number (19348421274).

Almost surely, 2^213111112331 is an apocalyptic number.

213111112331 is a deficient number, since it is larger than the sum of its proper divisors (19069942957).

213111112331 is a wasteful number, since it uses less digits than its factorization.

213111112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736462 (or 7736449 counting only the distinct ones).

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

Adding to 213111112331 its reverse (133211111312), we get a palindrome (346322223643).

The spelling of 213111112331 in words is "two hundred thirteen billion, one hundred eleven million, one hundred twelve thousand, three hundred thirty-one".