2111742185591 has 2 divisors, whose sum is σ = 2111742185592. Its totient is φ = 2111742185590.

The previous prime is 2111742185557. The next prime is 2111742185599. The reversal of 2111742185591 is 1955812471112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111742185591 - 2¹⁰ = 2111742184567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111742185599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055871092795 + 1055871092796.

It is an arithmetic number, because the mean of its divisors is an integer number (1055871092796).

Almost surely, 2^{2111742185591} is an apocalyptic number.

2111742185591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111742185591 is an equidigital number, since it uses as much as digits as its factorization.

2111742185591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 47.

The spelling of 2111742185591 in words is "two trillion, one hundred eleven billion, seven hundred forty-two million, one hundred eighty-five thousand, five hundred ninety-one".