12122213231 has 2 divisors, whose sum is σ = 12122213232. Its totient is φ = 12122213230.

The previous prime is 12122213209. The next prime is 12122213261. The reversal of 12122213231 is 13231222121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12122213231 - 2²⁶ = 12055104367 is a prime.

It is a super-2 number, since 2×12122213231² (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 (12122213261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061106615 + 6061106616.

It is an arithmetic number, because the mean of its divisors is an integer number (6061106616).

Almost surely, 2^12122213231 is an apocalyptic number.

12122213231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122213231 is an equidigital number, since it uses as much as digits as its factorization.

12122213231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

Adding to 12122213231 its reverse (13231222121), we get a palindrome (25353435352).

The spelling of 12122213231 in words is "twelve billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred thirty-one".