1222221697913 has 2 divisors, whose sum is σ = 1222221697914. Its totient is φ = 1222221697912.

The previous prime is 1222221697889. The next prime is 1222221697967. The reversal of 1222221697913 is 3197961222221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 719302445689 + 502919252224 = 848117^2 + 709168^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222221697913 - 2²⁴ = 1222204920697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222221697993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611110848956 + 611110848957.

It is an arithmetic number, because the mean of its divisors is an integer number (611110848957).

Almost surely, 2^{1222221697913} is an apocalyptic number.

It is an amenable number.

1222221697913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222221697913 is an equidigital number, since it uses as much as digits as its factorization.

1222221697913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The spelling of 1222221697913 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, six hundred ninety-seven thousand, nine hundred thirteen".