13121799 has 16 divisors (see below), whose sum is σ = 19219200. Its totient is φ = 7926336.

The previous prime is 13121743. The next prime is 13121803. The reversal of 13121799 is 99712131.

It is not a de Polignac number, because 13121799 - 2¹¹ = 13119751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3694 + ... + 6315.

It is an arithmetic number, because the mean of its divisors is an integer number (1201200).

Almost surely, 2^13121799 is an apocalyptic number.

13121799 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13121799 is a deficient number, since it is larger than the sum of its proper divisors (6097401).

13121799 is a wasteful number, since it uses less digits than its factorization.

13121799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054.

The product of its digits is 3402, while the sum is 33.

The square root of 13121799 is about 3622.4023796370. The cubic root of 13121799 is about 235.8655211539.

The spelling of 13121799 in words is "thirteen million, one hundred twenty-one thousand, seven hundred ninety-nine".