12222222281 has 2 divisors, whose sum is σ = 12222222282. Its totient is φ = 12222222280.

The previous prime is 12222222269. The next prime is 12222222307. The reversal of 12222222281 is 18222222221.

It is an a-pointer prime, because the next prime (12222222307) can be obtained adding 12222222281 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11911757881 + 310464400 = 109141^2 + 17620^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222222281 - 2¹⁸ = 12221960137 is a prime.

It is a super-2 number, since 2×12222222281² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12222222281.

It is not a weakly prime, because it can be changed into another prime (12222522281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111111140 + 6111111141.

It is an arithmetic number, because the mean of its divisors is an integer number (6111111141).

Almost surely, 2^12222222281 is an apocalyptic number.

It is an amenable number.

12222222281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222222281 is an equidigital number, since it uses as much as digits as its factorization.

12222222281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048, while the sum is 26.

The spelling of 12222222281 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred eighty-one".