1010222001991 has 2 divisors, whose sum is σ = 1010222001992. Its totient is φ = 1010222001990.

The previous prime is 1010222001959. The next prime is 1010222002019. The reversal of 1010222001991 is 1991002220101.

It is an a-pointer prime, because the next prime (1010222002019) can be obtained adding 1010222001991 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1010222001991 - 2⁵ = 1010222001959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010222002991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505111000995 + 505111000996.

It is an arithmetic number, because the mean of its divisors is an integer number (505111000996).

Almost surely, 2^{1010222001991} is an apocalyptic number.

1010222001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010222001991 is an equidigital number, since it uses as much as digits as its factorization.

1010222001991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 1010222001991 in words is "one trillion, ten billion, two hundred twenty-two million, one thousand, nine hundred ninety-one".