9902001012221 has 8 divisors (see below), whose sum is σ = 10258320843264. Its totient is φ = 9547987458960.

The previous prime is 9902001012217. The next prime is 9902001012307. The reversal of 9902001012221 is 1222101002099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9902001012221 - 2² = 9902001012217 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 (9902001012521) 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 7 ways as a sum of consecutive naturals, for example, 576560705 + ... + 576577878.

It is an arithmetic number, because the mean of its divisors is an integer number (1282290105408).

Almost surely, 2^{9902001012221} is an apocalyptic number.

It is an amenable number.

9902001012221 is a deficient number, since it is larger than the sum of its proper divisors (356319831043).

9902001012221 is a wasteful number, since it uses less digits than its factorization.

9902001012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153138891.

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

The spelling of 9902001012221 in words is "nine trillion, nine hundred two billion, one million, twelve thousand, two hundred twenty-one".