13121320355 has 32 divisors (see below), whose sum is σ = 18928546560. Its totient is φ = 8603844480.

The previous prime is 13121320343. The next prime is 13121320361. The reversal of 13121320355 is 55302312131.

It is not a de Polignac number, because 13121320355 - 2¹⁸ = 13121058211 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182645 + ... + 244134.

It is an arithmetic number, because the mean of its divisors is an integer number (591517080).

Almost surely, 2^13121320355 is an apocalyptic number.

13121320355 is a deficient number, since it is larger than the sum of its proper divisors (5807226205).

13121320355 is a wasteful number, since it uses less digits than its factorization.

13121320355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426851.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 13121320355 its reverse (55302312131), we get a palindrome (68423632486).

The spelling of 13121320355 in words is "thirteen billion, one hundred twenty-one million, three hundred twenty thousand, three hundred fifty-five".