245574122116021 has 2 divisors, whose sum is σ = 245574122116022. Its totient is φ = 245574122116020.

The previous prime is 245574122115991. The next prime is 245574122116033. The reversal of 245574122116021 is 120611221475542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225082837623121 + 20491284492900 = 15002761^2 + 4526730^2 .

It is a cyclic number.

It is not a de Polignac number, because 245574122116021 - 2⁷ = 245574122115893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245574122116121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122787061058010 + 122787061058011.

It is an arithmetic number, because the mean of its divisors is an integer number (122787061058011).

Almost surely, 2^{245574122116021} is an apocalyptic number.

It is an amenable number.

245574122116021 is a deficient number, since it is larger than the sum of its proper divisors (1).

245574122116021 is an equidigital number, since it uses as much as digits as its factorization.

245574122116021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 245574122116021 in words is "two hundred forty-five trillion, five hundred seventy-four billion, one hundred twenty-two million, one hundred sixteen thousand, twenty-one".