121210081 has 2 divisors, whose sum is σ = 121210082. Its totient is φ = 121210080.

The previous prime is 121210049. The next prime is 121210157. The reversal of 121210081 is 180012121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118701025 + 2509056 = 10895^2 + 1584^2 .

It is a cyclic number.

It is not a de Polignac number, because 121210081 - 2⁵ = 121210049 is a prime.

It is a super-2 number, since 2×121210081² = 29383767472053122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121210021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605040 + 60605041.

It is an arithmetic number, because the mean of its divisors is an integer number (60605041).

Almost surely, 2^121210081 is an apocalyptic number.

It is an amenable number.

121210081 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210081 is an equidigital number, since it uses as much as digits as its factorization.

121210081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 121210081 is about 11009.5449951394. The cubic root of 121210081 is about 494.8948264801.

The spelling of 121210081 in words is "one hundred twenty-one million, two hundred ten thousand, eighty-one".