22011323231 has 2 divisors, whose sum is σ = 22011323232. Its totient is φ = 22011323230.

The previous prime is 22011323179. The next prime is 22011323237. The reversal of 22011323231 is 13232311022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22011323231 is a prime.

It is a super-2 number, since 2×22011323231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011323237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005661615 + 11005661616.

It is an arithmetic number, because the mean of its divisors is an integer number (11005661616).

Almost surely, 2^22011323231 is an apocalyptic number.

22011323231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011323231 is an equidigital number, since it uses as much as digits as its factorization.

22011323231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 22011323231 its reverse (13232311022), we get a palindrome (35243634253).

The spelling of 22011323231 in words is "twenty-two billion, eleven million, three hundred twenty-three thousand, two hundred thirty-one".