2211377865791 has 2 divisors, whose sum is σ = 2211377865792. Its totient is φ = 2211377865790.

The previous prime is 2211377865659. The next prime is 2211377865797. The reversal of 2211377865791 is 1975687731122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2211377865791 - 2¹⁰ = 2211377864767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2211377865791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211377865797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105688932895 + 1105688932896.

It is an arithmetic number, because the mean of its divisors is an integer number (1105688932896).

Almost surely, 2^{2211377865791} is an apocalyptic number.

2211377865791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211377865791 is an equidigital number, since it uses as much as digits as its factorization.

2211377865791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8890560, while the sum is 59.

The spelling of 2211377865791 in words is "two trillion, two hundred eleven billion, three hundred seventy-seven million, eight hundred sixty-five thousand, seven hundred ninety-one".