111131201023231 has 4 divisors (see below), whose sum is σ = 111131224452864. Its totient is φ = 111131177593600.

The previous prime is 111131201023111. The next prime is 111131201023243. The reversal of 111131201023231 is 132320102131111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111131201023231 is a prime.

It is a super-2 number, since 2×111131201023231² (a number of 29 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 (111131201023331) 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, 1806655 + ... + 15017536.

It is an arithmetic number, because the mean of its divisors is an integer number (27782806113216).

Almost surely, 2^{111131201023231} is an apocalyptic number.

111131201023231 is a deficient number, since it is larger than the sum of its proper divisors (23429633).

111131201023231 is an equidigital number, since it uses as much as digits as its factorization.

111131201023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23429632.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 111131201023231 its reverse (132320102131111), we get a palindrome (243451303154342).

The spelling of 111131201023231 in words is "one hundred eleven trillion, one hundred thirty-one billion, two hundred one million, twenty-three thousand, two hundred thirty-one".