13121299 has 4 divisors (see below), whose sum is σ = 13149864. Its totient is φ = 13092736.

The previous prime is 13121291. The next prime is 13121309. The reversal of 13121299 is 99212131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99212131 = 53 ⋅1871927.

It is a cyclic number.

It is not a de Polignac number, because 13121299 - 2³ = 13121291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13582 + ... + 14515.

It is an arithmetic number, because the mean of its divisors is an integer number (3287466).

Almost surely, 2^13121299 is an apocalyptic number.

13121299 is a deficient number, since it is larger than the sum of its proper divisors (28565).

13121299 is an equidigital number, since it uses as much as digits as its factorization.

13121299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28564.

The product of its digits is 972, while the sum is 28.

The square root of 13121299 is about 3622.3333640072. Note that the first 4 decimals coincide. The cubic root of 13121299 is about 235.8625252675.

The spelling of 13121299 in words is "thirteen million, one hundred twenty-one thousand, two hundred ninety-nine".