21044713388611 has 4 divisors (see below), whose sum is σ = 22957869151224. Its totient is φ = 19131557626000.

The previous prime is 21044713388599. The next prime is 21044713388623. The reversal of 21044713388611 is 11688331744012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21044713388599) and next prime (21044713388623).

It is a cyclic number.

It is not a de Polignac number, because 21044713388611 - 2¹⁵ = 21044713355843 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21044713385611) 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 3 ways as a sum of consecutive naturals, for example, 956577881290 + ... + 956577881311.

It is an arithmetic number, because the mean of its divisors is an integer number (5739467287806).

Almost surely, 2^{21044713388611} is an apocalyptic number.

21044713388611 is a deficient number, since it is larger than the sum of its proper divisors (1913155762613).

21044713388611 is a wasteful number, since it uses less digits than its factorization.

21044713388611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913155762612.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 21044713388611 in words is "twenty-one trillion, forty-four billion, seven hundred thirteen million, three hundred eighty-eight thousand, six hundred eleven".