11331123313231 has 4 divisors (see below), whose sum is σ = 11331135382792. Its totient is φ = 11331111243672.

The previous prime is 11331123313183. The next prime is 11331123313247. The reversal of 11331123313231 is 13231332113311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11331123313231 - 2²⁵ = 11331089758799 is a prime.

It is a super-2 number, since 2×11331123313231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11331123313231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331123313261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4495716 + ... + 6547801.

It is an arithmetic number, because the mean of its divisors is an integer number (2832783845698).

Almost surely, 2^{11331123313231} is an apocalyptic number.

11331123313231 is a deficient number, since it is larger than the sum of its proper divisors (12069561).

11331123313231 is a wasteful number, since it uses less digits than its factorization.

11331123313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12069560.

The product of its digits is 2916, while the sum is 28.

Adding to 11331123313231 its reverse (13231332113311), we get a palindrome (24562455426542).

The spelling of 11331123313231 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-three million, three hundred thirteen thousand, two hundred thirty-one".