120011220 has 240 divisors, whose sum is σ = 453720960. Its totient is φ = 25940736.

The previous prime is 120011219. The next prime is 120011231. The reversal of 120011220 is 22110021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 215182 + ... + 215738.

It is an arithmetic number, because the mean of its divisors is an integer number (1890504).

Almost surely, 2^120011220 is an apocalyptic number.

120011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226860480).

120011220 is an abundant number, since it is smaller than the sum of its proper divisors (333709740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120011220 is a wasteful number, since it uses less digits than its factorization.

120011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 120011220 is about 10954.9632587243. The cubic root of 120011220 is about 493.2577871089.

Adding to 120011220 its reverse (22110021), we get a palindrome (142121241).

The spelling of 120011220 in words is "one hundred twenty million, eleven thousand, two hundred twenty".