22011091 has 2 divisors, whose sum is σ = 22011092. Its totient is φ = 22011090.

The previous prime is 22011089. The next prime is 22011109. The reversal of 22011091 is 19011022.

Together with next prime (22011109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22011091 - 2¹ = 22011089 is a prime.

Together with 22011089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22011001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005545 + 11005546.

It is an arithmetic number, because the mean of its divisors is an integer number (11005546).

Almost surely, 2^22011091 is an apocalyptic number.

22011091 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011091 is an equidigital number, since it uses as much as digits as its factorization.

22011091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 22011091 is about 4691.5979154228. The cubic root of 22011091 is about 280.2510121523.

It can be divided in two parts, 220 and 11091, that added together give a palindrome (11311).

The spelling of 22011091 in words is "twenty-two million, eleven thousand, ninety-one".