21060071166013 has 16 divisors (see below), whose sum is σ = 23459328081216. Its totient is φ = 18743179328640.

The previous prime is 21060071166011. The next prime is 21060071166031. The reversal of 21060071166013 is 31066117006012.

It is a cyclic number.

It is not a de Polignac number, because 21060071166013 - 2¹ = 21060071166011 is a prime.

It is a super-2 number, since 2×21060071166013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21060071166013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060071166011) 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 in 15 ways as a sum of consecutive naturals, for example, 39256131 + ... + 39788992.

It is an arithmetic number, because the mean of its divisors is an integer number (1466208005076).

Almost surely, 2^{21060071166013} is an apocalyptic number.

It is an amenable number.

21060071166013 is a deficient number, since it is larger than the sum of its proper divisors (2399256915203).

21060071166013 is a wasteful number, since it uses less digits than its factorization.

21060071166013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79045644.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 21060071166013 in words is "twenty-one trillion, sixty billion, seventy-one million, one hundred sixty-six thousand, thirteen".