9912202100021 has 16 divisors (see below), whose sum is σ = 10840161419136. Its totient is φ = 9008635584576.

The previous prime is 9912202099999. The next prime is 9912202100029. The reversal of 9912202100021 is 1200012022199.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9912202100021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9912202100029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15360425 + ... + 15992718.

It is an arithmetic number, because the mean of its divisors is an integer number (677510088696).

Almost surely, 2^{9912202100021} is an apocalyptic number.

It is an amenable number.

9912202100021 is a deficient number, since it is larger than the sum of its proper divisors (927959319115).

9912202100021 is a wasteful number, since it uses less digits than its factorization.

9912202100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31353532.

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

The spelling of 9912202100021 in words is "nine trillion, nine hundred twelve billion, two hundred two million, one hundred thousand, twenty-one".