21055107056711 has 16 divisors (see below), whose sum is σ = 25914925822464. Its totient is φ = 16658376434784.

The previous prime is 21055107056677. The next prime is 21055107056743. The reversal of 21055107056711 is 11765070155012.

It is not a de Polignac number, because 21055107056711 - 2¹⁴ = 21055107040327 is a prime.

It is a super-2 number, since 2×21055107056711² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21055107056611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1722155 + ... + 6713868.

It is an arithmetic number, because the mean of its divisors is an integer number (1619682863904).

Almost surely, 2^{21055107056711} is an apocalyptic number.

21055107056711 is a deficient number, since it is larger than the sum of its proper divisors (4859818765753).

21055107056711 is a wasteful number, since it uses less digits than its factorization.

21055107056711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8463470.

The product of its (nonzero) digits is 73500, while the sum is 41.

The spelling of 21055107056711 in words is "twenty-one trillion, fifty-five billion, one hundred seven million, fifty-six thousand, seven hundred eleven".