231120132161 has 2 divisors, whose sum is σ = 231120132162. Its totient is φ = 231120132160.

The previous prime is 231120132091. The next prime is 231120132163. The reversal of 231120132161 is 161231021132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173529731761 + 57590400400 = 416569^2 + 239980^2 .

It is a cyclic number.

It is not a de Polignac number, because 231120132161 - 2¹⁸ = 231119870017 is a prime.

Together with 231120132163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231120132163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560066080 + 115560066081.

It is an arithmetic number, because the mean of its divisors is an integer number (115560066081).

Almost surely, 2^231120132161 is an apocalyptic number.

It is an amenable number.

231120132161 is a deficient number, since it is larger than the sum of its proper divisors (1).

231120132161 is an equidigital number, since it uses as much as digits as its factorization.

231120132161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 231120132161 its reverse (161231021132), we get a palindrome (392351153293).

The spelling of 231120132161 in words is "two hundred thirty-one billion, one hundred twenty million, one hundred thirty-two thousand, one hundred sixty-one".