13231012215421 has 96 divisors (see below), whose sum is σ = 18273275792640. Its totient is φ = 9300257740800.

The previous prime is 13231012215419. The next prime is 13231012215437. The reversal of 13231012215421 is 12451221013231.

It is not a de Polignac number, because 13231012215421 - 2¹ = 13231012215419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13231012215421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231012215401) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 103480551 + ... + 103608331.

It is an arithmetic number, because the mean of its divisors is an integer number (190346622840).

Almost surely, 2^{13231012215421} is an apocalyptic number.

13231012215421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13231012215421 is a deficient number, since it is larger than the sum of its proper divisors (5042263577219).

13231012215421 is a wasteful number, since it uses less digits than its factorization.

13231012215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128007 (or 127994 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 13231012215421 its reverse (12451221013231), we get a palindrome (25682233228652).

The spelling of 13231012215421 in words is "thirteen trillion, two hundred thirty-one billion, twelve million, two hundred fifteen thousand, four hundred twenty-one".