12144121019 has 4 divisors (see below), whose sum is σ = 12472340544. Its totient is φ = 11815901496.

The previous prime is 12144121001. The next prime is 12144121021. The reversal of 12144121019 is 91012144121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12144121019 is a prime.

It is a super-2 number, since 2×12144121019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12144121039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164109707 + ... + 164109780.

It is an arithmetic number, because the mean of its divisors is an integer number (3118085136).

Almost surely, 2^12144121019 is an apocalyptic number.

12144121019 is a deficient number, since it is larger than the sum of its proper divisors (328219525).

12144121019 is an equidigital number, since it uses as much as digits as its factorization.

12144121019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328219524.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 12144121019 in words is "twelve billion, one hundred forty-four million, one hundred twenty-one thousand, nineteen".