233131221213 has 32 divisors (see below), whose sum is σ = 342812691072. Its totient is φ = 139747584000.

The previous prime is 233131221133. The next prime is 233131221223. The reversal of 233131221213 is 312122131332.

233131221213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 233131221213 - 2⁹ = 233131220701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3220545 + ... + 3292137.

It is an arithmetic number, because the mean of its divisors is an integer number (10712896596).

Almost surely, 2^233131221213 is an apocalyptic number.

It is an amenable number.

233131221213 is a deficient number, since it is larger than the sum of its proper divisors (109681469859).

233131221213 is a wasteful number, since it uses less digits than its factorization.

233131221213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72685.

The product of its digits is 1296, while the sum is 24.

Adding to 233131221213 its reverse (312122131332), we get a palindrome (545253352545).

The spelling of 233131221213 in words is "two hundred thirty-three billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred thirteen".