231121130993 has 2 divisors, whose sum is σ = 231121130994. Its totient is φ = 231121130992.

The previous prime is 231121130971. The next prime is 231121131013. The reversal of 231121130993 is 399031121132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230714987584 + 406143409 = 480328^2 + 20153^2 .

It is a cyclic number.

It is not a de Polignac number, because 231121130993 - 2¹⁰ = 231121129969 is a prime.

It is not a weakly prime, because it can be changed into another prime (231121130963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115560565496 + 115560565497.

It is an arithmetic number, because the mean of its divisors is an integer number (115560565497).

Almost surely, 2^231121130993 is an apocalyptic number.

It is an amenable number.

231121130993 is a deficient number, since it is larger than the sum of its proper divisors (1).

231121130993 is an equidigital number, since it uses as much as digits as its factorization.

231121130993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The spelling of 231121130993 in words is "two hundred thirty-one billion, one hundred twenty-one million, one hundred thirty thousand, nine hundred ninety-three".