121063561 has 2 divisors, whose sum is σ = 121063562. Its totient is φ = 121063560.

The previous prime is 121063541. The next prime is 121063577. The reversal of 121063561 is 165360121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91087936 + 29975625 = 9544^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 121063561 - 2⁷ = 121063433 is a prime.

It is not a weakly prime, because it can be changed into another prime (121063531) 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, 60531780 + 60531781.

It is an arithmetic number, because the mean of its divisors is an integer number (60531781).

Almost surely, 2^121063561 is an apocalyptic number.

It is an amenable number.

121063561 is a deficient number, since it is larger than the sum of its proper divisors (1).

121063561 is an equidigital number, since it uses as much as digits as its factorization.

121063561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 121063561 is about 11002.8887570492. Note that the first 3 decimals coincide. The cubic root of 121063561 is about 494.6953347471.

The spelling of 121063561 in words is "one hundred twenty-one million, sixty-three thousand, five hundred sixty-one".