2166221654711 has 2 divisors, whose sum is σ = 2166221654712. Its totient is φ = 2166221654710.

The previous prime is 2166221654599. The next prime is 2166221654717. The reversal of 2166221654711 is 1174561226612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2166221654711 - 2¹⁸ = 2166221392567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166221654717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083110827355 + 1083110827356.

It is an arithmetic number, because the mean of its divisors is an integer number (1083110827356).

Almost surely, 2^{2166221654711} is an apocalyptic number.

2166221654711 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166221654711 is an equidigital number, since it uses as much as digits as its factorization.

2166221654711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The spelling of 2166221654711 in words is "two trillion, one hundred sixty-six billion, two hundred twenty-one million, six hundred fifty-four thousand, seven hundred eleven".