13121660205235 has 32 divisors (see below), whose sum is σ = 16688763090432. Its totient is φ = 9883389035520.

The previous prime is 13121660205149. The next prime is 13121660205253. The reversal of 13121660205235 is 53250206612131.

It is not a de Polignac number, because 13121660205235 - 2¹⁷ = 13121660074163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121660205194 and 13121660205203.

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, 9287587 + ... + 10606723.

It is an arithmetic number, because the mean of its divisors is an integer number (521523846576).

Almost surely, 2^{13121660205235} is an apocalyptic number.

13121660205235 is a deficient number, since it is larger than the sum of its proper divisors (3567102885197).

13121660205235 is a wasteful number, since it uses less digits than its factorization.

13121660205235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320523.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 13121660205235 its reverse (53250206612131), we get a palindrome (66371866817366).

The spelling of 13121660205235 in words is "thirteen trillion, one hundred twenty-one billion, six hundred sixty million, two hundred five thousand, two hundred thirty-five".