1222001021999 has 2 divisors, whose sum is σ = 1222001022000. Its totient is φ = 1222001021998.

The previous prime is 1222001021953. The next prime is 1222001022023. The reversal of 1222001021999 is 9991201002221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222001021999 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222001021299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611000510999 + 611000511000.

It is an arithmetic number, because the mean of its divisors is an integer number (611000511000).

Almost surely, 2^{1222001021999} is an apocalyptic number.

1222001021999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222001021999 is an equidigital number, since it uses as much as digits as its factorization.

1222001021999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 1222001021999 in words is "one trillion, two hundred twenty-two billion, one million, twenty-one thousand, nine hundred ninety-nine".