231133032221 has 16 divisors (see below), whose sum is σ = 284859598464. Its totient is φ = 182624946624.

The previous prime is 231133032203. The next prime is 231133032253. The reversal of 231133032221 is 122230331132.

It is a cyclic number.

It is not a de Polignac number, because 231133032221 - 2³⁴ = 213953163037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231133032281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1665851 + ... + 1799256.

It is an arithmetic number, because the mean of its divisors is an integer number (17803724904).

Almost surely, 2^231133032221 is an apocalyptic number.

It is an amenable number.

231133032221 is a deficient number, since it is larger than the sum of its proper divisors (53726566243).

231133032221 is a wasteful number, since it uses less digits than its factorization.

231133032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465860.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231133032221 its reverse (122230331132), we get a palindrome (353363363353).

The spelling of 231133032221 in words is "two hundred thirty-one billion, one hundred thirty-three million, thirty-two thousand, two hundred twenty-one".