21170755027711 has 2 divisors, whose sum is σ = 21170755027712. Its totient is φ = 21170755027710.

The previous prime is 21170755027693. The next prime is 21170755027717. The reversal of 21170755027711 is 11772055707112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21170755027711 - 2⁵ = 21170755027679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21170755027717) 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, 10585377513855 + 10585377513856.

It is an arithmetic number, because the mean of its divisors is an integer number (10585377513856).

Almost surely, 2^{21170755027711} is an apocalyptic number.

21170755027711 is a deficient number, since it is larger than the sum of its proper divisors (1).

21170755027711 is an equidigital number, since it uses as much as digits as its factorization.

21170755027711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240100, while the sum is 46.

The spelling of 21170755027711 in words is "twenty-one trillion, one hundred seventy billion, seven hundred fifty-five million, twenty-seven thousand, seven hundred eleven".