9102000221 has 4 divisors (see below), whose sum is σ = 9103020444. Its totient is φ = 9100980000.

The previous prime is 9102000161. The next prime is 9102000223. The reversal of 9102000221 is 1220002019.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2223122500 + 6878877721 = 47150^2 + 82939^2 .

It is a cyclic number.

It is not a de Polignac number, because 9102000221 - 2⁶ = 9102000157 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 9102000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9102000223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496610 + ... + 514611.

It is an arithmetic number, because the mean of its divisors is an integer number (2275755111).

Almost surely, 2^9102000221 is an apocalyptic number.

It is an amenable number.

9102000221 is a deficient number, since it is larger than the sum of its proper divisors (1020223).

9102000221 is a wasteful number, since it uses less digits than its factorization.

9102000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020222.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 9102000221 is about 95404.4035723719. The cubic root of 9102000221 is about 2087.9124337705.

The spelling of 9102000221 in words is "nine billion, one hundred two million, two hundred twenty-one", and thus it is an aban number.