21014044041013 has 8 divisors (see below), whose sum is σ = 21070890033336. Its totient is φ = 20957200766400.

The previous prime is 21014044040959. The next prime is 21014044041071. The reversal of 21014044041013 is 31014044041012.

It can be written as a sum of positive squares in 4 ways, for example, as 222842531844 + 20791201509169 = 472062^2 + 4559737^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21014044041013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014044045013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15314403 + ... + 16630063.

It is an arithmetic number, because the mean of its divisors is an integer number (2633861254167).

Almost surely, 2^{21014044041013} is an apocalyptic number.

It is an amenable number.

21014044041013 is a deficient number, since it is larger than the sum of its proper divisors (56845992323).

21014044041013 is a wasteful number, since it uses less digits than its factorization.

21014044041013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358855.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21014044041013 its reverse (31014044041012), we get a palindrome (52028088082025).

Subtracting 21014044041013 from its reverse (31014044041012), we obtain a palindrome (9999999999999).

The spelling of 21014044041013 in words is "twenty-one trillion, fourteen billion, forty-four million, forty-one thousand, thirteen".