213131231110 has 32 divisors (see below), whose sum is σ = 449135088192. Its totient is φ = 71291281920.

The previous prime is 213131231107. The next prime is 213131231111. The reversal of 213131231110 is 11132131312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131231111) 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 15 ways as a sum of consecutive naturals, for example, 37128007 + ... + 37133746.

It is an arithmetic number, because the mean of its divisors is an integer number (14035471506).

Almost surely, 2^213131231110 is an apocalyptic number.

213131231110 is an abundant number, since it is smaller than the sum of its proper divisors (236003857082).

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

213131231110 is a wasteful number, since it uses less digits than its factorization.

213131231110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74261808.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 213131231110 its reverse (11132131312), we get a palindrome (224263362422).

The spelling of 213131231110 in words is "two hundred thirteen billion, one hundred thirty-one million, two hundred thirty-one thousand, one hundred ten".