12204031121 has 4 divisors (see below), whose sum is σ = 12226342512. Its totient is φ = 12181719732.

The previous prime is 12204031109. The next prime is 12204031171. The reversal of 12204031121 is 12113040221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12113040221 = 5333 ⋅2271337.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12204031121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12204031121.

It is not an unprimeable number, because it can be changed into a prime (12204031171) 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, 11154875 + ... + 11155968.

It is an arithmetic number, because the mean of its divisors is an integer number (3056585628).

Almost surely, 2^12204031121 is an apocalyptic number.

It is an amenable number.

12204031121 is a deficient number, since it is larger than the sum of its proper divisors (22311391).

12204031121 is an equidigital number, since it uses as much as digits as its factorization.

12204031121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22311390.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12204031121 its reverse (12113040221), we get a palindrome (24317071342).

The spelling of 12204031121 in words is "twelve billion, two hundred four million, thirty-one thousand, one hundred twenty-one".