13121660205240 has 128 divisors (see below), whose sum is σ = 40724047296000. Its totient is φ = 3378313261568.

The previous prime is 13121660205149. The next prime is 13121660205253. The reversal of 13121660205240 is 4250206612131.

It is a congruent number.

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, 107258587 + ... + 107380853.

It is an arithmetic number, because the mean of its divisors is an integer number (318156619500).

Almost surely, 2^{13121660205240} is an apocalyptic number.

13121660205240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121660205240 is an abundant number, since it is smaller than the sum of its proper divisors (27602387090760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121660205240 is a wasteful number, since it uses less digits than its factorization.

13121660205240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153149 (or 153145 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 13121660205240 its reverse (4250206612131), we get a palindrome (17371866817371).

The spelling of 13121660205240 in words is "thirteen trillion, one hundred twenty-one billion, six hundred sixty million, two hundred five thousand, two hundred forty".