12121443441 has 6 divisors (see below), whose sum is σ = 17508751650. Its totient is φ = 8080962288.

The previous prime is 12121443413. The next prime is 12121443457. The reversal of 12121443441 is 14434412121.

12121443441 is a `hidden beast` number, since 1 + 2 + 1 + 214 + 4 + 3 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6454515600 + 5666927841 = 80340^2 + 75279^2 .

It is not a de Polignac number, because 12121443441 - 2⁵ = 12121443409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121443541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673413516 + ... + 673413533.

It is an arithmetic number, because the mean of its divisors is an integer number (2918125275).

Almost surely, 2^12121443441 is an apocalyptic number.

It is an amenable number.

12121443441 is a deficient number, since it is larger than the sum of its proper divisors (5387308209).

12121443441 is a wasteful number, since it uses less digits than its factorization.

12121443441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346827055 (or 1346827052 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 12121443441 its reverse (14434412121), we get a palindrome (26555855562).

The spelling of 12121443441 in words is "twelve billion, one hundred twenty-one million, four hundred forty-three thousand, four hundred forty-one".