1100021310991 has 2 divisors, whose sum is σ = 1100021310992. Its totient is φ = 1100021310990.

The previous prime is 1100021310953. The next prime is 1100021311001. The reversal of 1100021310991 is 1990131200011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1100021310991 - 2¹⁹ = 1100020786703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100021310901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550010655495 + 550010655496.

It is an arithmetic number, because the mean of its divisors is an integer number (550010655496).

Almost surely, 2^{1100021310991} is an apocalyptic number.

1100021310991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100021310991 is an equidigital number, since it uses as much as digits as its factorization.

1100021310991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 28.

The spelling of 1100021310991 in words is "one trillion, one hundred billion, twenty-one million, three hundred ten thousand, nine hundred ninety-one".