12121343441 has 4 divisors (see below), whose sum is σ = 12326790000. Its totient is φ = 11915896884.

The previous prime is 12121343431. The next prime is 12121343447. The reversal of 12121343441 is 14434312121.

12121343441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 14434312121 = 151 ⋅95591471.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121343441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121343441.

It is not an unprimeable number, because it can be changed into a prime (12121343447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102723191 + ... + 102723308.

It is an arithmetic number, because the mean of its divisors is an integer number (3081697500).

Almost surely, 2^12121343441 is an apocalyptic number.

It is an amenable number.

12121343441 is a deficient number, since it is larger than the sum of its proper divisors (205446559).

12121343441 is an equidigital number, since it uses as much as digits as its factorization.

12121343441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205446558.

The product of its digits is 2304, while the sum is 26.

Adding to 12121343441 its reverse (14434312121), we get a palindrome (26555655562).

The spelling of 12121343441 in words is "twelve billion, one hundred twenty-one million, three hundred forty-three thousand, four hundred forty-one".