12204044040821 has 2 divisors, whose sum is σ = 12204044040822. Its totient is φ = 12204044040820.

The previous prime is 12204044040817. The next prime is 12204044040871. The reversal of 12204044040821 is 12804044040221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12121266996721 + 82777044100 = 3481561^2 + 287710^2 .

It is a cyclic number.

It is not a de Polignac number, because 12204044040821 - 2² = 12204044040817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12204044040871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102022020410 + 6102022020411.

It is an arithmetic number, because the mean of its divisors is an integer number (6102022020411).

Almost surely, 2^{12204044040821} is an apocalyptic number.

It is an amenable number.

12204044040821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12204044040821 is an equidigital number, since it uses as much as digits as its factorization.

12204044040821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16384, while the sum is 32.

The spelling of 12204044040821 in words is "twelve trillion, two hundred four billion, forty-four million, forty thousand, eight hundred twenty-one".