8910210221 has 12 divisors (see below), whose sum is σ = 10369979676. Its totient is φ = 7623707520.

The previous prime is 8910210163. The next prime is 8910210229. The reversal of 8910210221 is 1220120198.

It can be written as a sum of positive squares in 2 ways, for example, as 5383156900 + 3527053321 = 73370^2 + 59389^2 .

It is not a de Polignac number, because 8910210221 - 2¹⁴ = 8910193837 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 (8910210229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2163770 + ... + 2167883.

It is an arithmetic number, because the mean of its divisors is an integer number (864164973).

Almost surely, 2^8910210221 is an apocalyptic number.

It is an amenable number.

8910210221 is a deficient number, since it is larger than the sum of its proper divisors (1459769455).

8910210221 is a wasteful number, since it uses less digits than its factorization.

8910210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331692 (or 4331681 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 8910210221 is about 94393.9098724065. The cubic root of 8910210221 is about 2073.1432732083.

The spelling of 8910210221 in words is "eight billion, nine hundred ten million, two hundred ten thousand, two hundred twenty-one".