2211231231 has 56 divisors (see below), whose sum is σ = 3694305024. Its totient is φ = 1311402960.

The previous prime is 2211231227. The next prime is 2211231233. The reversal of 2211231231 is 1321321122.

It is not a de Polignac number, because 2211231231 - 2² = 2211231227 is a prime.

It is a super-2 number, since 2×2211231231² = 9779087113899550722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211231233) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 373960 + ... + 379826.

Almost surely, 2^2211231231 is an apocalyptic number.

2211231231 is a deficient number, since it is larger than the sum of its proper divisors (1483073793).

2211231231 is an equidigital number, since it uses as much as digits as its factorization.

2211231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943 (or 5928 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2211231231 is about 47023.7305091801. The cubic root of 2211231231 is about 1302.8009098918.

Adding to 2211231231 its reverse (1321321122), we get a palindrome (3532552353).

The spelling of 2211231231 in words is "two billion, two hundred eleven million, two hundred thirty-one thousand, two hundred thirty-one".