13044204256421 has 4 divisors (see below), whose sum is σ = 14047604583852. Its totient is φ = 12040803928992.

The previous prime is 13044204256409. The next prime is 13044204256423. The reversal of 13044204256421 is 12465240244031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5400162630625 + 7644041625796 = 2323825^2 + 2764786^2 .

It is a cyclic number.

It is not a de Polignac number, because 13044204256421 - 2⁶ = 13044204256357 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 (13044204256423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501700163696 + ... + 501700163721.

It is an arithmetic number, because the mean of its divisors is an integer number (3511901145963).

Almost surely, 2^{13044204256421} is an apocalyptic number.

It is an amenable number.

13044204256421 is a deficient number, since it is larger than the sum of its proper divisors (1003400327431).

13044204256421 is a wasteful number, since it uses less digits than its factorization.

13044204256421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003400327430.

The product of its (nonzero) digits is 184320, while the sum is 38.

The spelling of 13044204256421 in words is "thirteen trillion, forty-four billion, two hundred four million, two hundred fifty-six thousand, four hundred twenty-one".