231020999929 has 2 divisors, whose sum is σ = 231020999930. Its totient is φ = 231020999928.

The previous prime is 231020999897. The next prime is 231020999987. The reversal of 231020999929 is 929999020132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184732338025 + 46288661904 = 429805^2 + 215148^2 .

It is a cyclic number.

It is not a de Polignac number, because 231020999929 - 2⁵ = 231020999897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231020999929.

It is not a weakly prime, because it can be changed into another prime (231020999329) 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, 115510499964 + 115510499965.

It is an arithmetic number, because the mean of its divisors is an integer number (115510499965).

Almost surely, 2^231020999929 is an apocalyptic number.

It is an amenable number.

231020999929 is a deficient number, since it is larger than the sum of its proper divisors (1).

231020999929 is an equidigital number, since it uses as much as digits as its factorization.

231020999929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The spelling of 231020999929 in words is "two hundred thirty-one billion, twenty million, nine hundred ninety-nine thousand, nine hundred twenty-nine".