11331131232231 has 12 divisors (see below), whose sum is σ = 16477036469400. Its totient is φ = 7503388913520.

The previous prime is 11331131232221. The next prime is 11331131232233. The reversal of 11331131232231 is 13223213113311.

11331131232231 is a `hidden beast` number, since 1 + 1 + 3 + 311 + 3 + 123 + 223 + 1 = 666.

It is not a de Polignac number, because 11331131232231 - 2⁷ = 11331131232103 is a prime.

It is a super-2 number, since 2×11331131232231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11331131232195 and 11331131232204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331131232233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4224879805 + ... + 4224882486.

It is an arithmetic number, because the mean of its divisors is an integer number (1373086372450).

Almost surely, 2^{11331131232231} is an apocalyptic number.

11331131232231 is a deficient number, since it is larger than the sum of its proper divisors (5145905237169).

11331131232231 is a wasteful number, since it uses less digits than its factorization.

11331131232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8449762446 (or 8449762443 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

Adding to 11331131232231 its reverse (13223213113311), we get a palindrome (24554344345542).

The spelling of 11331131232231 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred thirty-one".