9902121201121 has 8 divisors (see below), whose sum is σ = 10484688664800. Its totient is φ = 9319563709248.

The previous prime is 9902121201083. The next prime is 9902121201163. The reversal of 9902121201121 is 1211021212099.

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 9902121201121 - 2²³ = 9902112812513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9902121201221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398211 + ... + 4467976.

It is an arithmetic number, because the mean of its divisors is an integer number (1310586083100).

Almost surely, 2^{9902121201121} is an apocalyptic number.

It is an amenable number.

9902121201121 is a deficient number, since it is larger than the sum of its proper divisors (582567463679).

9902121201121 is a wasteful number, since it uses less digits than its factorization.

9902121201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985903.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 9902121201121 in words is "nine trillion, nine hundred two billion, one hundred twenty-one million, two hundred one thousand, one hundred twenty-one".