1222420961 has 2 divisors, whose sum is σ = 1222420962. Its totient is φ = 1222420960.

The previous prime is 1222420943. The next prime is 1222421087. The reversal of 1222420961 is 1690242221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1214940736 + 7480225 = 34856^2 + 2735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222420961 - 2²⁶ = 1155312097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222420931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611210480 + 611210481.

It is an arithmetic number, because the mean of its divisors is an integer number (611210481).

Almost surely, 2^1222420961 is an apocalyptic number.

It is an amenable number.

1222420961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222420961 is an equidigital number, since it uses as much as digits as its factorization.

1222420961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1222420961 is about 34963.1371733144. The cubic root of 1222420961 is about 1069.2360578990.

The spelling of 1222420961 in words is "one billion, two hundred twenty-two million, four hundred twenty thousand, nine hundred sixty-one".