13215124321 has 8 divisors (see below), whose sum is σ = 15897894080. Its totient is φ = 10731078288.

The previous prime is 13215124309. The next prime is 13215124361. The reversal of 13215124321 is 12342151231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13215124321 - 2¹⁷ = 13214993249 is a prime.

It is a super-2 number, since 2×13215124321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13215124361) 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, 49680786 + ... + 49681051.

It is an arithmetic number, because the mean of its divisors is an integer number (1987236760).

Almost surely, 2^13215124321 is an apocalyptic number.

It is an amenable number.

13215124321 is a deficient number, since it is larger than the sum of its proper divisors (2682769759).

13215124321 is an equidigital number, since it uses as much as digits as its factorization.

13215124321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99361863.

The product of its digits is 1440, while the sum is 25.

Adding to 13215124321 its reverse (12342151231), we get a palindrome (25557275552).

The spelling of 13215124321 in words is "thirteen billion, two hundred fifteen million, one hundred twenty-four thousand, three hundred twenty-one".