22091121 has 24 divisors (see below), whose sum is σ = 35171136. Its totient is φ = 13275360.

The previous prime is 22091117. The next prime is 22091137. The reversal of 22091121 is 12119022.

It is not a de Polignac number, because 22091121 - 2² = 22091117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22091094 and 22091103.

It is not an unprimeable number, because it can be changed into a prime (22091141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2836 + ... + 7226.

It is an arithmetic number, because the mean of its divisors is an integer number (1465464).

Almost surely, 2^22091121 is an apocalyptic number.

It is an amenable number.

22091121 is a deficient number, since it is larger than the sum of its proper divisors (13080015).

22091121 is a wasteful number, since it uses less digits than its factorization.

22091121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453 (or 4450 counting only the distinct ones).

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

The square root of 22091121 is about 4700.1192538062. The cubic root of 22091121 is about 280.5902556839.

The spelling of 22091121 in words is "twenty-two million, ninety-one thousand, one hundred twenty-one".