80844400121 has 2 divisors, whose sum is σ = 80844400122. Its totient is φ = 80844400120.

The previous prime is 80844400019. The next prime is 80844400129. The reversal of 80844400121 is 12100444808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71858308096 + 8986092025 = 268064^2 + 94795^2 .

It is a cyclic number.

It is not a de Polignac number, because 80844400121 - 2¹⁸ = 80844137977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80844400129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40422200060 + 40422200061.

It is an arithmetic number, because the mean of its divisors is an integer number (40422200061).

Almost surely, 2^80844400121 is an apocalyptic number.

It is an amenable number.

80844400121 is a deficient number, since it is larger than the sum of its proper divisors (1).

80844400121 is an equidigital number, since it uses as much as digits as its factorization.

80844400121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8192, while the sum is 32.

Adding to 80844400121 its reverse (12100444808), we get a palindrome (92944844929).

The spelling of 80844400121 in words is "eighty billion, eight hundred forty-four million, four hundred thousand, one hundred twenty-one".