13121321255 has 8 divisors (see below), whose sum is σ = 17994954912. Its totient is φ = 8997477408.

The previous prime is 13121321243. The next prime is 13121321281. The reversal of 13121321255 is 55212312131.

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

It is a cyclic number.

It is not a de Polignac number, because 13121321255 - 2¹⁰ = 13121320231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187447412 + ... + 187447481.

It is an arithmetic number, because the mean of its divisors is an integer number (2249369364).

Almost surely, 2^13121321255 is an apocalyptic number.

13121321255 is a deficient number, since it is larger than the sum of its proper divisors (4873633657).

13121321255 is an equidigital number, since it uses as much as digits as its factorization.

13121321255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374894905.

The product of its digits is 1800, while the sum is 26.

Adding to 13121321255 its reverse (55212312131), we get a palindrome (68333633386).

The spelling of 13121321255 in words is "thirteen billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred fifty-five".