9999902120202 has 24 divisors (see below), whose sum is σ = 21673902783780. Its totient is φ = 3332154831360.

The previous prime is 9999902120191. The next prime is 9999902120207. The reversal of 9999902120202 is 2020212099999.

It can be written as a sum of positive squares in 2 ways, for example, as 8445818256561 + 1554083863641 = 2906169^2 + 1246629^2 .

It is not an unprimeable number, because it can be changed into a prime (9999902120207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95435799 + ... + 95540522.

Almost surely, 2^{9999902120202} is an apocalyptic number.

9999902120202 is an abundant number, since it is smaller than the sum of its proper divisors (11674000663578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999902120202 is a wasteful number, since it uses less digits than its factorization.

9999902120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190979238 (or 190979235 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 9999902120202 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred two million, one hundred twenty thousand, two hundred two".