2133111231 has 12 divisors (see below), whose sum is σ = 3081569400. Its totient is φ = 1421885520.

The previous prime is 2133111229. The next prime is 2133111263. The reversal of 2133111231 is 1321113312.

It is not a de Polignac number, because 2133111231 - 2¹ = 2133111229 is a prime.

It is a super-2 number, since 2×2133111231² = 9100327047636670722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133111221) 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, 103420 + ... + 122318.

It is an arithmetic number, because the mean of its divisors is an integer number (256797450).

Almost surely, 2^2133111231 is an apocalyptic number.

2133111231 is a deficient number, since it is larger than the sum of its proper divisors (948458169).

2133111231 is a wasteful number, since it uses less digits than its factorization.

2133111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31446 (or 31443 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 2133111231 is about 46185.6171443015. The cubic root of 2133111231 is about 1287.2745034560.

Adding to 2133111231 its reverse (1321113312), we get a palindrome (3454224543).

The spelling of 2133111231 in words is "two billion, one hundred thirty-three million, one hundred eleven thousand, two hundred thirty-one".