13121241999 has 8 divisors (see below), whose sum is σ = 17705772672. Its totient is φ = 8642103000.

The previous prime is 13121241989. The next prime is 13121242007. The reversal of 13121241999 is 99914212131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13121241999 - 2⁴ = 13121241983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13121241999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121241949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26347627 + ... + 26348124.

It is an arithmetic number, because the mean of its divisors is an integer number (2213221584).

Almost surely, 2^13121241999 is an apocalyptic number.

13121241999 is a deficient number, since it is larger than the sum of its proper divisors (4584530673).

13121241999 is an equidigital number, since it uses as much as digits as its factorization.

13121241999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52695837.

The product of its digits is 34992, while the sum is 42.

The spelling of 13121241999 in words is "thirteen billion, one hundred twenty-one million, two hundred forty-one thousand, nine hundred ninety-nine".