21222022099 has 4 divisors (see below), whose sum is σ = 22144718736. Its totient is φ = 20299325464.

The previous prime is 21222022093. The next prime is 21222022123. The reversal of 21222022099 is 99022022212.

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

It is not a de Polignac number, because 21222022099 - 2³ = 21222022091 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 21222022099.

It is not an unprimeable number, because it can be changed into a prime (21222022091) 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, 461348284 + ... + 461348329.

It is an arithmetic number, because the mean of its divisors is an integer number (5536179684).

Almost surely, 2^21222022099 is an apocalyptic number.

21222022099 is a deficient number, since it is larger than the sum of its proper divisors (922696637).

21222022099 is an equidigital number, since it uses as much as digits as its factorization.

21222022099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922696636.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 21222022099 in words is "twenty-one billion, two hundred twenty-two million, twenty-two thousand, ninety-nine".