12513222231521 has 8 divisors (see below), whose sum is σ = 13785944205888. Its totient is φ = 11263026310000.

The previous prime is 12513222231493. The next prime is 12513222231529.

12513222231521 is nontrivially palindromic in base 10.

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-12513222231521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12513222231529) 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, 5631512045 + ... + 5631514266.

It is an arithmetic number, because the mean of its divisors is an integer number (1723243025736).

Almost surely, 2^{12513222231521} is an apocalyptic number.

12513222231521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12513222231521 is a deficient number, since it is larger than the sum of its proper divisors (1272721974367).

12513222231521 is a wasteful number, since it uses less digits than its factorization.

12513222231521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11263026423.

The product of its digits is 14400, while the sum is 32.

It can be divided in two parts, 1251322 and 2231521, that added together give a palindrome (3482843).

The spelling of 12513222231521 in words is "twelve trillion, five hundred thirteen billion, two hundred twenty-two million, two hundred thirty-one thousand, five hundred twenty-one".