231373488821 has 2 divisors, whose sum is σ = 231373488822. Its totient is φ = 231373488820.

The previous prime is 231373488767. The next prime is 231373488823. The reversal of 231373488821 is 128884373132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121623075025 + 109750413796 = 348745^2 + 331286^2 .

It is a cyclic number.

It is not a de Polignac number, because 231373488821 - 2¹⁰ = 231373487797 is a prime.

It is a Sophie Germain prime.

Together with 231373488823, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231373488821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231373488823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115686744410 + 115686744411.

It is an arithmetic number, because the mean of its divisors is an integer number (115686744411).

Almost surely, 2^231373488821 is an apocalyptic number.

It is an amenable number.

231373488821 is a deficient number, since it is larger than the sum of its proper divisors (1).

231373488821 is an equidigital number, since it uses as much as digits as its factorization.

231373488821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1548288, while the sum is 50.

The spelling of 231373488821 in words is "two hundred thirty-one billion, three hundred seventy-three million, four hundred eighty-eight thousand, eight hundred twenty-one".