232121231 has 2 divisors, whose sum is σ = 232121232. Its totient is φ = 232121230.

The previous prime is 232121177. The next prime is 232121237. The reversal of 232121231 is 132121232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 232121231 - 2¹⁸ = 231859087 is a prime.

It is a super-2 number, since 2×232121231² = 107760531761910722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232121237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116060615 + 116060616.

It is an arithmetic number, because the mean of its divisors is an integer number (116060616).

Almost surely, 2^232121231 is an apocalyptic number.

232121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

232121231 is an equidigital number, since it uses as much as digits as its factorization.

232121231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 232121231 is about 15235.5252945214. The cubic root of 232121231 is about 614.5703752475.

Adding to 232121231 its reverse (132121232), we get a palindrome (364242463).

Subtracting from 232121231 its reverse (132121232), we obtain a palindrome (99999999).

The spelling of 232121231 in words is "two hundred thirty-two million, one hundred twenty-one thousand, two hundred thirty-one".