104857772021 has 2 divisors, whose sum is σ = 104857772022. Its totient is φ = 104857772020.

The previous prime is 104857772017. The next prime is 104857772053. The reversal of 104857772021 is 120277758401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74739904996 + 30117867025 = 273386^2 + 173545^2 .

It is a cyclic number.

It is not a de Polignac number, because 104857772021 - 2² = 104857772017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104857712021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52428886010 + 52428886011.

It is an arithmetic number, because the mean of its divisors is an integer number (52428886011).

Almost surely, 2^104857772021 is an apocalyptic number.

It is an amenable number.

104857772021 is a deficient number, since it is larger than the sum of its proper divisors (1).

104857772021 is an equidigital number, since it uses as much as digits as its factorization.

104857772021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 104857772021 in words is "one hundred four billion, eight hundred fifty-seven million, seven hundred seventy-two thousand, twenty-one".