11122291 has 2 divisors, whose sum is σ = 11122292. Its totient is φ = 11122290.

The previous prime is 11122289. The next prime is 11122297. The reversal of 11122291 is 19222111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19222111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11122291 - 2¹ = 11122289 is a prime.

Together with 11122289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11122297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561145 + 5561146.

It is an arithmetic number, because the mean of its divisors is an integer number (5561146).

Almost surely, 2^11122291 is an apocalyptic number.

11122291 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122291 is an equidigital number, since it uses as much as digits as its factorization.

11122291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 19.

The square root of 11122291 is about 3335.0098950378. The cubic root of 11122291 is about 223.2191334664.

It can be divided in two parts, 1112 and 2291, that added together give a triangular number (3403 = T₈₂).

The spelling of 11122291 in words is "eleven million, one hundred twenty-two thousand, two hundred ninety-one".