2101100023591 has 2 divisors, whose sum is σ = 2101100023592. Its totient is φ = 2101100023590.

The previous prime is 2101100023559. The next prime is 2101100023601. The reversal of 2101100023591 is 1953200011012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101100023591 - 2⁵ = 2101100023559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101100023501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050550011795 + 1050550011796.

It is an arithmetic number, because the mean of its divisors is an integer number (1050550011796).

Almost surely, 2^{2101100023591} is an apocalyptic number.

2101100023591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101100023591 is an equidigital number, since it uses as much as digits as its factorization.

2101100023591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The spelling of 2101100023591 in words is "two trillion, one hundred one billion, one hundred million, twenty-three thousand, five hundred ninety-one".