11331312232031 has 16 divisors (see below), whose sum is σ = 12741234536448. Its totient is φ = 9988187697600.

The previous prime is 11331312232027. The next prime is 11331312232057. The reversal of 11331312232031 is 13023221313311.

It is a cyclic number.

It is not a de Polignac number, because 11331312232031 - 2² = 11331312232027 is a prime.

It is a super-2 number, since 2×11331312232031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331312232081) 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, 87366815 + ... + 87496416.

It is an arithmetic number, because the mean of its divisors is an integer number (796327158528).

Almost surely, 2^{11331312232031} is an apocalyptic number.

11331312232031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11331312232031 is a deficient number, since it is larger than the sum of its proper divisors (1409922304417).

11331312232031 is a wasteful number, since it uses less digits than its factorization.

11331312232031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174863422.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 11331312232031 its reverse (13023221313311), we get a palindrome (24354533545342).

The spelling of 11331312232031 in words is "eleven trillion, three hundred thirty-one billion, three hundred twelve million, two hundred thirty-two thousand, thirty-one".