12221302231 has 2 divisors, whose sum is σ = 12221302232. Its totient is φ = 12221302230.

The previous prime is 12221302213. The next prime is 12221302243. The reversal of 12221302231 is 13220312221.

Together with previous prime (12221302213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12221302231 - 2¹⁷ = 12221171159 is a prime.

It is a super-2 number, since 2×12221302231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12221302199 and 12221302208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221302271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110651115 + 6110651116.

It is an arithmetic number, because the mean of its divisors is an integer number (6110651116).

Almost surely, 2^12221302231 is an apocalyptic number.

12221302231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221302231 is an equidigital number, since it uses as much as digits as its factorization.

12221302231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12221302231 its reverse (13220312221), we get a palindrome (25441614452).

The spelling of 12221302231 in words is "twelve billion, two hundred twenty-one million, three hundred two thousand, two hundred thirty-one".