231552500451121 has 2 divisors, whose sum is σ = 231552500451122. Its totient is φ = 231552500451120.

The previous prime is 231552500451119. The next prime is 231552500451163. The reversal of 231552500451121 is 121154005255132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203182645266225 + 28369855184896 = 14254215^2 + 5326336^2 .

It is a cyclic number.

It is not a de Polignac number, because 231552500451121 - 2¹ = 231552500451119 is a prime.

Together with 231552500451119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231552500551121) 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 as a sum of consecutive naturals, namely, 115776250225560 + 115776250225561.

It is an arithmetic number, because the mean of its divisors is an integer number (115776250225561).

Almost surely, 2^{231552500451121} is an apocalyptic number.

It is an amenable number.

231552500451121 is a deficient number, since it is larger than the sum of its proper divisors (1).

231552500451121 is an equidigital number, since it uses as much as digits as its factorization.

231552500451121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 231552500451121 in words is "two hundred thirty-one trillion, five hundred fifty-two billion, five hundred million, four hundred fifty-one thousand, one hundred twenty-one".