2001101999591 has 2 divisors, whose sum is σ = 2001101999592. Its totient is φ = 2001101999590.

The previous prime is 2001101999581. The next prime is 2001101999609. The reversal of 2001101999591 is 1959991011002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001101999591 - 2³⁰ = 2000028257767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001101999521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000550999795 + 1000550999796.

It is an arithmetic number, because the mean of its divisors is an integer number (1000550999796).

Almost surely, 2^{2001101999591} is an apocalyptic number.

2001101999591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001101999591 is an equidigital number, since it uses as much as digits as its factorization.

2001101999591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 47.

The spelling of 2001101999591 in words is "two trillion, one billion, one hundred one million, nine hundred ninety-nine thousand, five hundred ninety-one".