80800000121 has 2 divisors, whose sum is σ = 80800000122. Its totient is φ = 80800000120.

The previous prime is 80800000081. The next prime is 80800000123. The reversal of 80800000121 is 12100000808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77751745600 + 3048254521 = 278840^2 + 55211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80800000121 is a prime.

Together with 80800000123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 80800000093 and 80800000102.

It is not a weakly prime, because it can be changed into another prime (80800000123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40400000060 + 40400000061.

It is an arithmetic number, because the mean of its divisors is an integer number (40400000061).

Almost surely, 2^80800000121 is an apocalyptic number.

It is an amenable number.

80800000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

80800000121 is an equidigital number, since it uses as much as digits as its factorization.

80800000121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 80800000121 its reverse (12100000808), we get a palindrome (92900000929).

The spelling of 80800000121 in words is "eighty billion, eight hundred million, one hundred twenty-one", and thus it is an aban number.