1022199999991 has 2 divisors, whose sum is σ = 1022199999992. Its totient is φ = 1022199999990.

The previous prime is 1022199999973. The next prime is 1022200000043. The reversal of 1022199999991 is 1999999912201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022199999991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1022199999991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022199997991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511099999995 + 511099999996.

It is an arithmetic number, because the mean of its divisors is an integer number (511099999996).

Almost surely, 2^{1022199999991} is an apocalyptic number.

1022199999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022199999991 is an equidigital number, since it uses as much as digits as its factorization.

1022199999991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19131876, while the sum is 70.

The spelling of 1022199999991 in words is "one trillion, twenty-two billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".