22512211 has 2 divisors, whose sum is σ = 22512212. Its totient is φ = 22512210.

The previous prime is 22512209. The next prime is 22512229. The reversal of 22512211 is 11221522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22512211 - 2¹ = 22512209 is a prime.

Together with 22512209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22512311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11256105 + 11256106.

It is an arithmetic number, because the mean of its divisors is an integer number (11256106).

Almost surely, 2^22512211 is an apocalyptic number.

22512211 is a deficient number, since it is larger than the sum of its proper divisors (1).

22512211 is an equidigital number, since it uses as much as digits as its factorization.

22512211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80, while the sum is 16.

The square root of 22512211 is about 4744.7034680789. The cubic root of 22512211 is about 282.3618704990.

Adding to 22512211 its reverse (11221522), we get a palindrome (33733733).

The spelling of 22512211 in words is "twenty-two million, five hundred twelve thousand, two hundred eleven".