231221752093 has 2 divisors, whose sum is σ = 231221752094. Its totient is φ = 231221752092.

The previous prime is 231221752067. The next prime is 231221752123. The reversal of 231221752093 is 390257122132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231189795684 + 31956409 = 480822^2 + 5653^2 .

It is a cyclic number.

It is not a de Polignac number, because 231221752093 - 2²⁵ = 231188197661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231221752033) 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, 115610876046 + 115610876047.

It is an arithmetic number, because the mean of its divisors is an integer number (115610876047).

Almost surely, 2^231221752093 is an apocalyptic number.

It is an amenable number.

231221752093 is a deficient number, since it is larger than the sum of its proper divisors (1).

231221752093 is an equidigital number, since it uses as much as digits as its factorization.

231221752093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 231221752093 in words is "two hundred thirty-one billion, two hundred twenty-one million, seven hundred fifty-two thousand, ninety-three".