120216556 has 12 divisors (see below), whose sum is σ = 210456792. Its totient is φ = 60086048.

The previous prime is 120216521. The next prime is 120216557. The reversal of 120216556 is 655612021.

It is a super-2 number, since 2×120216556² = 28904040673002272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120216557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15336 + ... + 21808.

It is an arithmetic number, because the mean of its divisors is an integer number (17538066).

Almost surely, 2^120216556 is an apocalyptic number.

It is an amenable number.

120216556 is a deficient number, since it is larger than the sum of its proper divisors (90240236).

120216556 is a wasteful number, since it uses less digits than its factorization.

120216556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120 (or 11118 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 120216556 is about 10964.3310785474. The cubic root of 120216556 is about 493.5389437967.

Adding to 120216556 its reverse (655612021), we get a palindrome (775828577).

The spelling of 120216556 in words is "one hundred twenty million, two hundred sixteen thousand, five hundred fifty-six".