11331131231 has 8 divisors (see below), whose sum is σ = 12963962880. Its totient is φ = 9701824248.

The previous prime is 11331131167. The next prime is 11331131233. The reversal of 11331131231 is 13213113311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11331131231 - 2⁶ = 11331131167 is a prime.

It is a super-2 number, since 2×11331131231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331131233) 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, 874271 + ... + 887136.

It is an arithmetic number, because the mean of its divisors is an integer number (1620495360).

Almost surely, 2^11331131231 is an apocalyptic number.

11331131231 is a deficient number, since it is larger than the sum of its proper divisors (1632831649).

11331131231 is an equidigital number, since it uses as much as digits as its factorization.

11331131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762333.

The product of its digits is 162, while the sum is 20.

Adding to 11331131231 its reverse (13213113311), we get a palindrome (24544244542).

The spelling of 11331131231 in words is "eleven billion, three hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty-one".