9021196621 has 4 divisors (see below), whose sum is σ = 9191407932. Its totient is φ = 8850985312.

The previous prime is 9021196579. The next prime is 9021196627. The reversal of 9021196621 is 1266911209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1266911209 = 24337 ⋅52057.

It can be written as a sum of positive squares in 2 ways, for example, as 5407984521 + 3613212100 = 73539^2 + 60110^2 .

It is a cyclic number.

It is not a de Polignac number, because 9021196621 - 2⁷ = 9021196493 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 (9021196627) 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, 85105576 + ... + 85105681.

It is an arithmetic number, because the mean of its divisors is an integer number (2297851983).

Almost surely, 2^9021196621 is an apocalyptic number.

It is an amenable number.

9021196621 is a deficient number, since it is larger than the sum of its proper divisors (170211311).

9021196621 is a wasteful number, since it uses less digits than its factorization.

9021196621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170211310.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 9021196621 is about 94979.9801063361. The cubic root of 9021196621 is about 2081.7155334141.

The spelling of 9021196621 in words is "nine billion, twenty-one million, one hundred ninety-six thousand, six hundred twenty-one".