1022199997991 has 2 divisors, whose sum is σ = 1022199997992. Its totient is φ = 1022199997990.

The previous prime is 1022199997913. The next prime is 1022199998003. The reversal of 1022199997991 is 1997999912201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022199997991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022199997901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511099998995 + 511099998996.

It is an arithmetic number, because the mean of its divisors is an integer number (511099998996).

Almost surely, 2^{1022199997991} is an apocalyptic number.

1022199997991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022199997991 is an equidigital number, since it uses as much as digits as its factorization.

1022199997991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14880348, while the sum is 68.

The spelling of 1022199997991 in words is "one trillion, twenty-two billion, one hundred ninety-nine million, nine hundred ninety-seven thousand, nine hundred ninety-one".