902122021 has 8 divisors (see below), whose sum is σ = 910039040. Its totient is φ = 894217968.

The previous prime is 902122009. The next prime is 902122037. The reversal of 902122021 is 120221209.

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 902122021 - 2⁵ = 902121989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 902122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902122321) 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, 181315 + ... + 186223.

It is an arithmetic number, because the mean of its divisors is an integer number (113754880).

Almost surely, 2^902122021 is an apocalyptic number.

It is an amenable number.

902122021 is a deficient number, since it is larger than the sum of its proper divisors (7917019).

902122021 is a wasteful number, since it uses less digits than its factorization.

902122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483.

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

The square root of 902122021 is about 30035.3461941094. The cubic root of 902122021 is about 966.2475996587.

The spelling of 902122021 in words is "nine hundred two million, one hundred twenty-two thousand, twenty-one".