11331121323231 has 12 divisors (see below), whose sum is σ = 16367527839000. Its totient is φ = 7553918146320.

The previous prime is 11331121323209. The next prime is 11331121323331. The reversal of 11331121323231 is 13232312113311.

11331121323231 is a `hidden beast` number, since 1 + 1 + 3 + 311 + 2 + 1 + 323 + 23 + 1 = 666.

It is not a de Polignac number, because 11331121323231 - 2⁶ = 11331121323167 is a prime.

It is a super-2 number, since 2×11331121323231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11331121323195 and 11331121323204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331121323031) 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, 13119580 + ... + 13956561.

It is an arithmetic number, because the mean of its divisors is an integer number (1363960653250).

Almost surely, 2^{11331121323231} is an apocalyptic number.

11331121323231 is a deficient number, since it is larger than the sum of its proper divisors (5036406515769).

11331121323231 is a wasteful number, since it uses less digits than its factorization.

11331121323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27122646 (or 27122643 counting only the distinct ones).

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

Adding to 11331121323231 its reverse (13232312113311), we get a palindrome (24563433436542).

The spelling of 11331121323231 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred thirty-one".