902211221221 has 8 divisors (see below), whose sum is σ = 907802169120. Its totient is φ = 896620955472.

The previous prime is 902211221213. The next prime is 902211221227. The reversal of 902211221221 is 122122112209.

It is a happy number.

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 902211221221 - 2³ = 902211221213 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 (902211221227) 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, 2624250 + ... + 2948068.

It is an arithmetic number, because the mean of its divisors is an integer number (113475271140).

Almost surely, 2^902211221221 is an apocalyptic number.

It is an amenable number.

902211221221 is a deficient number, since it is larger than the sum of its proper divisors (5590947899).

902211221221 is a wasteful number, since it uses less digits than its factorization.

902211221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341075.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 902211221221 in words is "nine hundred two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-one".