120229561 has 2 divisors, whose sum is σ = 120229562. Its totient is φ = 120229560.

The previous prime is 120229553. The next prime is 120229583. The reversal of 120229561 is 165922021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95179536 + 25050025 = 9756^2 + 5005^2 .

It is a cyclic number.

It is not a de Polignac number, because 120229561 - 2³ = 120229553 is a prime.

It is not a weakly prime, because it can be changed into another prime (120229861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60114780 + 60114781.

It is an arithmetic number, because the mean of its divisors is an integer number (60114781).

Almost surely, 2^120229561 is an apocalyptic number.

It is an amenable number.

120229561 is a deficient number, since it is larger than the sum of its proper divisors (1).

120229561 is an equidigital number, since it uses as much as digits as its factorization.

120229561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 120229561 is about 10964.9241219445. The cubic root of 120229561 is about 493.5567401323.

The spelling of 120229561 in words is "one hundred twenty million, two hundred twenty-nine thousand, five hundred sixty-one".