11311333231 has 16 divisors (see below), whose sum is σ = 13633567488. Its totient is φ = 9257353600.

The previous prime is 11311333211. The next prime is 11311333237. The reversal of 11311333231 is 13233311311.

It is not a de Polignac number, because 11311333231 - 2⁵ = 11311333199 is a prime.

It is a super-2 number, since 2×11311333231² (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 (11311333237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1310665 + ... + 1319266.

It is an arithmetic number, because the mean of its divisors is an integer number (852097968).

Almost surely, 2^11311333231 is an apocalyptic number.

11311333231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11311333231 is a deficient number, since it is larger than the sum of its proper divisors (2322234257).

11311333231 is a wasteful number, since it uses less digits than its factorization.

11311333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629982.

The product of its digits is 486, while the sum is 22.

Adding to 11311333231 its reverse (13233311311), we get a palindrome (24544644542).

The spelling of 11311333231 in words is "eleven billion, three hundred eleven million, three hundred thirty-three thousand, two hundred thirty-one".