80511121 has 2 divisors, whose sum is σ = 80511122. Its totient is φ = 80511120.

The previous prime is 80511103. The next prime is 80511127. The reversal of 80511121 is 12111508.

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., 80299521 + 211600 = 8961^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 80511121 - 2⁷ = 80510993 is a prime.

It is not a weakly prime, because it can be changed into another prime (80511127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40255560 + 40255561.

It is an arithmetic number, because the mean of its divisors is an integer number (40255561).

Almost surely, 2^80511121 is an apocalyptic number.

It is an amenable number.

80511121 is a deficient number, since it is larger than the sum of its proper divisors (1).

80511121 is an equidigital number, since it uses as much as digits as its factorization.

80511121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

The square root of 80511121 is about 8972.7989501604. The cubic root of 80511121 is about 431.8026379712.

Adding to 80511121 its reverse (12111508), we get a palindrome (92622629).

The spelling of 80511121 in words is "eighty million, five hundred eleven thousand, one hundred twenty-one".