22212131 has 2 divisors, whose sum is σ = 22212132. Its totient is φ = 22212130.

The previous prime is 22212109. The next prime is 22212133. The reversal of 22212131 is 13121222.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212131 is a prime.

It is a super-2 number, since 2×22212131² = 986757527122322, which contains 22 as substring.

Together with 22212133, 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 (22212133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106065 + 11106066.

It is an arithmetic number, because the mean of its divisors is an integer number (11106066).

Almost surely, 2^22212131 is an apocalyptic number.

22212131 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212131 is an equidigital number, since it uses as much as digits as its factorization.

22212131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48, while the sum is 14.

The square root of 22212131 is about 4712.9747506219. The cubic root of 22212131 is about 281.1016589917.

Adding to 22212131 its reverse (13121222), we get a palindrome (35333353).

Subtracting from 22212131 its reverse (13121222), we obtain a palindrome (9090909).

The spelling of 22212131 in words is "twenty-two million, two hundred twelve thousand, one hundred thirty-one".