231044104032221 has 2 divisors, whose sum is σ = 231044104032222. Its totient is φ = 231044104032220.

The previous prime is 231044104032199. The next prime is 231044104032251. The reversal of 231044104032221 is 122230401440132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227293645740121 + 3750458292100 = 15076261^2 + 1936610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231044104032221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231044104032251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115522052016110 + 115522052016111.

It is an arithmetic number, because the mean of its divisors is an integer number (115522052016111).

Almost surely, 2^{231044104032221} is an apocalyptic number.

It is an amenable number.

231044104032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

231044104032221 is an equidigital number, since it uses as much as digits as its factorization.

231044104032221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 231044104032221 its reverse (122230401440132), we get a palindrome (353274505472353).

The spelling of 231044104032221 in words is "two hundred thirty-one trillion, forty-four billion, one hundred four million, thirty-two thousand, two hundred twenty-one".