13444515052421 has 32 divisors (see below), whose sum is σ = 14332736056320. Its totient is φ = 12567471667200.

The previous prime is 13444515052417. The next prime is 13444515052433. The reversal of 13444515052421 is 12425051544431.

13444515052421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13444515052421 - 2² = 13444515052417 is a prime.

It is a super-2 number, since 2×13444515052421² (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 (13444515052021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2152152320 + ... + 2152158566.

It is an arithmetic number, because the mean of its divisors is an integer number (447898001760).

Almost surely, 2^{13444515052421} is an apocalyptic number.

It is an amenable number.

13444515052421 is a deficient number, since it is larger than the sum of its proper divisors (888221003899).

13444515052421 is a wasteful number, since it uses less digits than its factorization.

13444515052421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7925.

The product of its (nonzero) digits is 384000, while the sum is 41.

Adding to 13444515052421 its reverse (12425051544431), we get a palindrome (25869566596852).

The spelling of 13444515052421 in words is "thirteen trillion, four hundred forty-four billion, five hundred fifteen million, fifty-two thousand, four hundred twenty-one".