120216643 has 4 divisors (see below), whose sum is σ = 120241080. Its totient is φ = 120192208.

The previous prime is 120216641. The next prime is 120216683. The reversal of 120216643 is 346612021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120216643 - 2¹ = 120216641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120216641) 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 in 3 ways as a sum of consecutive naturals, for example, 1978 + ... + 15631.

It is an arithmetic number, because the mean of its divisors is an integer number (30060270).

Almost surely, 2^120216643 is an apocalyptic number.

120216643 is a deficient number, since it is larger than the sum of its proper divisors (24437).

120216643 is an equidigital number, since it uses as much as digits as its factorization.

120216643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24436.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 120216643 is about 10964.3350459570. The cubic root of 120216643 is about 493.5390628537.

Adding to 120216643 its reverse (346612021), we get a palindrome (466828664).

The spelling of 120216643 in words is "one hundred twenty million, two hundred sixteen thousand, six hundred forty-three".