1001000002091 has 2 divisors, whose sum is σ = 1001000002092. Its totient is φ = 1001000002090.

The previous prime is 1001000002073. The next prime is 1001000002099. The reversal of 1001000002091 is 1902000001001.

1001000002091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001000002091 - 2³⁴ = 983820132907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001000002099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500500001045 + 500500001046.

It is an arithmetic number, because the mean of its divisors is an integer number (500500001046).

Almost surely, 2^{1001000002091} is an apocalyptic number.

1001000002091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001000002091 is an equidigital number, since it uses as much as digits as its factorization.

1001000002091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 1001000002091 its reverse (1902000001001), we get a palindrome (2903000003092).

The spelling of 1001000002091 in words is "one trillion, one billion, two thousand, ninety-one".