1222223445691 has 2 divisors, whose sum is σ = 1222223445692. Its totient is φ = 1222223445690.

The previous prime is 1222223445679. The next prime is 1222223445697. The reversal of 1222223445691 is 1965443222221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222223445691 - 2⁷ = 1222223445563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222223445697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611111722845 + 611111722846.

It is an arithmetic number, because the mean of its divisors is an integer number (611111722846).

Almost surely, 2^{1222223445691} is an apocalyptic number.

1222223445691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222223445691 is an equidigital number, since it uses as much as digits as its factorization.

1222223445691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The spelling of 1222223445691 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-three million, four hundred forty-five thousand, six hundred ninety-one".