121580281 has 2 divisors, whose sum is σ = 121580282. Its totient is φ = 121580280.

The previous prime is 121580257. The next prime is 121580287. The reversal of 121580281 is 182085121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63744256 + 57836025 = 7984^2 + 7605^2 .

It is a cyclic number.

It is not a de Polignac number, because 121580281 - 2⁷ = 121580153 is a prime.

It is a super-2 number, since 2×121580281² = 29563529456077922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121580287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60790140 + 60790141.

It is an arithmetic number, because the mean of its divisors is an integer number (60790141).

Almost surely, 2^121580281 is an apocalyptic number.

It is an amenable number.

121580281 is a deficient number, since it is larger than the sum of its proper divisors (1).

121580281 is an equidigital number, since it uses as much as digits as its factorization.

121580281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 121580281 is about 11026.3448612856. The cubic root of 121580281 is about 495.3981505682.

The spelling of 121580281 in words is "one hundred twenty-one million, five hundred eighty thousand, two hundred eighty-one".