1001100920891 has 2 divisors, whose sum is σ = 1001100920892. Its totient is φ = 1001100920890.

The previous prime is 1001100920851. The next prime is 1001100920893. The reversal of 1001100920891 is 1980290011001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001100920891 - 2¹⁰ = 1001100919867 is a prime.

Together with 1001100920893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1001100920893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500550460445 + 500550460446.

It is an arithmetic number, because the mean of its divisors is an integer number (500550460446).

Almost surely, 2^{1001100920891} is an apocalyptic number.

1001100920891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001100920891 is an equidigital number, since it uses as much as digits as its factorization.

1001100920891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

Adding to 1001100920891 its reverse (1980290011001), we get a palindrome (2981390931892).

The spelling of 1001100920891 in words is "one trillion, one billion, one hundred million, nine hundred twenty thousand, eight hundred ninety-one".