22120911 has 16 divisors (see below), whose sum is σ = 33169920. Its totient is φ = 14568120.

The previous prime is 22120907. The next prime is 22120913. The reversal of 22120911 is 11902122.

It is not a de Polignac number, because 22120911 - 2² = 22120907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2695 + ... + 7176.

It is an arithmetic number, because the mean of its divisors is an integer number (2073120).

Almost surely, 2^22120911 is an apocalyptic number.

22120911 is a deficient number, since it is larger than the sum of its proper divisors (11049009).

22120911 is an equidigital number, since it uses as much as digits as its factorization.

22120911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9963 (or 9957 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 22120911 is about 4703.2872546762. The cubic root of 22120911 is about 280.7163248747.

The spelling of 22120911 in words is "twenty-two million, one hundred twenty thousand, nine hundred eleven".