98175610021 has 2 divisors, whose sum is σ = 98175610022. Its totient is φ = 98175610020.

The previous prime is 98175610007. The next prime is 98175610051. The reversal of 98175610021 is 12001657189.

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., 82245636225 + 15929973796 = 286785^2 + 126214^2 .

It is a cyclic number.

It is not a de Polignac number, because 98175610021 - 2⁵ = 98175609989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98175610051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49087805010 + 49087805011.

It is an arithmetic number, because the mean of its divisors is an integer number (49087805011).

Almost surely, 2^98175610021 is an apocalyptic number.

It is an amenable number.

98175610021 is a deficient number, since it is larger than the sum of its proper divisors (1).

98175610021 is an equidigital number, since it uses as much as digits as its factorization.

98175610021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 98175610021 in words is "ninety-eight billion, one hundred seventy-five million, six hundred ten thousand, twenty-one".