9202001221 has 16 divisors (see below), whose sum is σ = 10676828160. Its totient is φ = 7767491760.

The previous prime is 9202001209. The next prime is 9202001251. The reversal of 9202001221 is 1221002029.

It is not a de Polignac number, because 9202001221 - 2⁵ = 9202001189 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 (9202001251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446670 + ... + 466816.

It is an arithmetic number, because the mean of its divisors is an integer number (667301760).

Almost surely, 2^9202001221 is an apocalyptic number.

It is an amenable number.

9202001221 is a deficient number, since it is larger than the sum of its proper divisors (1474826939).

9202001221 is a wasteful number, since it uses less digits than its factorization.

9202001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21144.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 9202001221 is about 95927.0619846141. The cubic root of 9202001221 is about 2095.5310270918.

The spelling of 9202001221 in words is "nine billion, two hundred two million, one thousand, two hundred twenty-one".