12421244113 has 4 divisors (see below), whose sum is σ = 12422853988. Its totient is φ = 12419634240.

The previous prime is 12421244057. The next prime is 12421244131. The reversal of 12421244113 is 31144212421.

12421244113 = 78807² + 78808².

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

It can be written as a sum of positive squares in 2 ways, for example, as 6210700864 + 6210543249 = 78808^2 + 78807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12421244113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421244513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793308 + ... + 808813.

It is an arithmetic number, because the mean of its divisors is an integer number (3105713497).

Almost surely, 2^12421244113 is an apocalyptic number.

12421244113 is the 78808-th centered square number.

It is an amenable number.

12421244113 is a deficient number, since it is larger than the sum of its proper divisors (1609875).

12421244113 is an equidigital number, since it uses as much as digits as its factorization.

12421244113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609874.

The product of its digits is 1536, while the sum is 25.

Adding to 12421244113 its reverse (31144212421), we get a palindrome (43565456534).

The spelling of 12421244113 in words is "twelve billion, four hundred twenty-one million, two hundred forty-four thousand, one hundred thirteen".