98910021021 has 32 divisors (see below), whose sum is σ = 154273625088. Its totient is φ = 55188241920.

The previous prime is 98910021019. The next prime is 98910021043. The reversal of 98910021021 is 12012001989.

It is not a de Polignac number, because 98910021021 - 2¹ = 98910021019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98910021121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3187501 + ... + 3218381.

It is an arithmetic number, because the mean of its divisors is an integer number (4821050784).

Almost surely, 2^98910021021 is an apocalyptic number.

It is an amenable number.

98910021021 is a deficient number, since it is larger than the sum of its proper divisors (55363604067).

98910021021 is a wasteful number, since it uses less digits than its factorization.

98910021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34481.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 98910021021 in words is "ninety-eight billion, nine hundred ten million, twenty-one thousand, twenty-one".