2044220446421 has 2 divisors, whose sum is σ = 2044220446422. Its totient is φ = 2044220446420.

The previous prime is 2044220446393. The next prime is 2044220446441. The reversal of 2044220446421 is 1246440224402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1127387386225 + 916833060196 = 1061785^2 + 957514^2 .

It is a cyclic number.

It is not a de Polignac number, because 2044220446421 - 2¹⁸ = 2044220184277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2044220446441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022110223210 + 1022110223211.

It is an arithmetic number, because the mean of its divisors is an integer number (1022110223211).

Almost surely, 2^{2044220446421} is an apocalyptic number.

It is an amenable number.

2044220446421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2044220446421 is an equidigital number, since it uses as much as digits as its factorization.

2044220446421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98304, while the sum is 35.

The spelling of 2044220446421 in words is "two trillion, forty-four billion, two hundred twenty million, four hundred forty-six thousand, four hundred twenty-one".