1222412281 has 2 divisors, whose sum is σ = 1222412282. Its totient is φ = 1222412280.

The previous prime is 1222412273. The next prime is 1222412339. The reversal of 1222412281 is 1822142221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1222201600 + 210681 = 34960^2 + 459^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222412281 - 2³ = 1222412273 is a prime.

It is a super-2 number, since 2×1222412281² = 2988583569479245922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1222412881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611206140 + 611206141.

It is an arithmetic number, because the mean of its divisors is an integer number (611206141).

Almost surely, 2^1222412281 is an apocalyptic number.

It is an amenable number.

1222412281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222412281 is an equidigital number, since it uses as much as digits as its factorization.

1222412281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 25.

The square root of 1222412281 is about 34963.0130423566. The cubic root of 1222412281 is about 1069.2335271312.

The spelling of 1222412281 in words is "one billion, two hundred twenty-two million, four hundred twelve thousand, two hundred eighty-one".