1220120659 has 2 divisors, whose sum is σ = 1220120660. Its totient is φ = 1220120658.

The previous prime is 1220120653. The next prime is 1220120747. The reversal of 1220120659 is 9560210221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220120659 - 2⁹ = 1220120147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220120653) 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, 610060329 + 610060330.

It is an arithmetic number, because the mean of its divisors is an integer number (610060330).

Almost surely, 2^1220120659 is an apocalyptic number.

1220120659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220120659 is an equidigital number, since it uses as much as digits as its factorization.

1220120659 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 1220120659 is about 34930.2255790025. The cubic root of 1220120659 is about 1068.5649551430.

The spelling of 1220120659 in words is "one billion, two hundred twenty million, one hundred twenty thousand, six hundred fifty-nine".