9902102010221 has 4 divisors (see below), whose sum is σ = 10221524655744. Its totient is φ = 9582679364700.

The previous prime is 9902102010193. The next prime is 9902102010223. The reversal of 9902102010221 is 1220102012099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9902102010221 - 2¹⁰ = 9902102009197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9902102010223) 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 in 3 ways as a sum of consecutive naturals, for example, 159711322715 + ... + 159711322776.

It is an arithmetic number, because the mean of its divisors is an integer number (2555381163936).

Almost surely, 2^{9902102010221} is an apocalyptic number.

It is an amenable number.

9902102010221 is a deficient number, since it is larger than the sum of its proper divisors (319422645523).

9902102010221 is a wasteful number, since it uses less digits than its factorization.

9902102010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319422645522.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 9902102010221 in words is "nine trillion, nine hundred two billion, one hundred two million, ten thousand, two hundred twenty-one".