902240042221 has 16 divisors (see below), whose sum is σ = 1087040471040. Its totient is φ = 732478425840.

The previous prime is 902240042191. The next prime is 902240042239. The reversal of 902240042221 is 122240042209.

It is not a de Polignac number, because 902240042221 - 2⁹ = 902240041709 is a prime.

It is a super-2 number, since 2×902240042221² (a number of 25 digits) contains 22 as substring.

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 902240042221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902240042621) 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, 44221591 + ... + 44241988.

It is an arithmetic number, because the mean of its divisors is an integer number (67940029440).

Almost surely, 2^902240042221 is an apocalyptic number.

It is an amenable number.

902240042221 is a deficient number, since it is larger than the sum of its proper divisors (184800428819).

902240042221 is a wasteful number, since it uses less digits than its factorization.

902240042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88463664.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 902240042221 in words is "nine hundred two billion, two hundred forty million, forty-two thousand, two hundred twenty-one".