22012210091 has 4 divisors (see below), whose sum is σ = 22012548792. Its totient is φ = 22011871392.

The previous prime is 22012210039. The next prime is 22012210123. The reversal of 22012210091 is 19001221022.

It is a happy number.

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 22012210091 - 2³⁴ = 4832340907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22012215091) 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, 37805 + ... + 213198.

It is an arithmetic number, because the mean of its divisors is an integer number (5503137198).

Almost surely, 2^22012210091 is an apocalyptic number.

22012210091 is a deficient number, since it is larger than the sum of its proper divisors (338701).

22012210091 is an equidigital number, since it uses as much as digits as its factorization.

22012210091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338700.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 22012210091 in words is "twenty-two billion, twelve million, two hundred ten thousand, ninety-one".