22221002091 has 4 divisors (see below), whose sum is σ = 29628002792. Its totient is φ = 14814001392.

The previous prime is 22221002059. The next prime is 22221002143. The reversal of 22221002091 is 19020012222.

It is a happy number.

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

It is not a de Polignac number, because 22221002091 - 2⁵ = 22221002059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221002191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3703500346 + ... + 3703500351.

It is an arithmetic number, because the mean of its divisors is an integer number (7407000698).

Almost surely, 2^22221002091 is an apocalyptic number.

22221002091 is a deficient number, since it is larger than the sum of its proper divisors (7407000701).

22221002091 is an equidigital number, since it uses as much as digits as its factorization.

22221002091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407000700.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 22221002091 in words is "twenty-two billion, two hundred twenty-one million, two thousand, ninety-one".