22111361 has 2 divisors, whose sum is σ = 22111362. Its totient is φ = 22111360.

The previous prime is 22111357. The next prime is 22111363. The reversal of 22111361 is 16311122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20421361 + 1690000 = 4519^2 + 1300^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111361 - 2² = 22111357 is a prime.

Together with 22111363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22111363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055680 + 11055681.

It is an arithmetic number, because the mean of its divisors is an integer number (11055681).

Almost surely, 2^22111361 is an apocalyptic number.

It is an amenable number.

22111361 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111361 is an equidigital number, since it uses as much as digits as its factorization.

22111361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 17.

The square root of 22111361 is about 4702.2718977107. The cubic root of 22111361 is about 280.6759222773.

Adding to 22111361 its reverse (16311122), we get a palindrome (38422483).

The spelling of 22111361 in words is "twenty-two million, one hundred eleven thousand, three hundred sixty-one".