12243204445 has 4 divisors (see below), whose sum is σ = 14691845340. Its totient is φ = 9794563552.

The previous prime is 12243204431. The next prime is 12243204473. The reversal of 12243204445 is 54440234221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54440234221 = 163 ⋅333989167.

It can be written as a sum of positive squares in 2 ways, for example, as 3065947641 + 9177256804 = 55371^2 + 95798^2 .

It is a cyclic number.

It is not a de Polignac number, because 12243204445 - 2⁷ = 12243204317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1224320440 + ... + 1224320449.

It is an arithmetic number, because the mean of its divisors is an integer number (3672961335).

Almost surely, 2^12243204445 is an apocalyptic number.

It is an amenable number.

12243204445 is a deficient number, since it is larger than the sum of its proper divisors (2448640895).

12243204445 is an equidigital number, since it uses as much as digits as its factorization.

12243204445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448640894.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 12243204445 its reverse (54440234221), we get a palindrome (66683438666).

The spelling of 12243204445 in words is "twelve billion, two hundred forty-three million, two hundred four thousand, four hundred forty-five".