22212120091 has 4 divisors (see below), whose sum is σ = 25385280112. Its totient is φ = 19038960072.

The previous prime is 22212120071. The next prime is 22212120101. The reversal of 22212120091 is 19002121222.

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

It is a cyclic number.

It is not a de Polignac number, because 22212120091 - 2⁵ = 22212120059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212120001) 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, 1586580000 + ... + 1586580013.

It is an arithmetic number, because the mean of its divisors is an integer number (6346320028).

Almost surely, 2^22212120091 is an apocalyptic number.

22212120091 is a deficient number, since it is larger than the sum of its proper divisors (3173160021).

22212120091 is an equidigital number, since it uses as much as digits as its factorization.

22212120091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173160020.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 22212120091 in words is "twenty-two billion, two hundred twelve million, one hundred twenty thousand, ninety-one".