13143402043421 has 16 divisors (see below), whose sum is σ = 14326222041600. Its totient is φ = 11985148929600.

The previous prime is 13143402043397. The next prime is 13143402043433. The reversal of 13143402043421 is 12434020434131.

It is a cyclic number.

It is not a de Polignac number, because 13143402043421 - 2³⁸ = 12868524136477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143402045421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11936255 + ... + 12990803.

It is an arithmetic number, because the mean of its divisors is an integer number (895388877600).

Almost surely, 2^{13143402043421} is an apocalyptic number.

It is an amenable number.

13143402043421 is a deficient number, since it is larger than the sum of its proper divisors (1182819998179).

13143402043421 is a wasteful number, since it uses less digits than its factorization.

13143402043421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066196.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 13143402043421 its reverse (12434020434131), we get a palindrome (25577422477552).

The spelling of 13143402043421 in words is "thirteen trillion, one hundred forty-three billion, four hundred two million, forty-three thousand, four hundred twenty-one".