120512220 has 72 divisors (see below), whose sum is σ = 343845264. Its totient is φ = 31537152.

The previous prime is 120512213. The next prime is 120512233. The reversal of 120512220 is 22215021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 120512220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208572 + ... + 209148.

Almost surely, 2^120512220 is an apocalyptic number.

120512220 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 120512220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171922632).

120512220 is an abundant number, since it is smaller than the sum of its proper divisors (223333044).

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

120512220 is a wasteful number, since it uses less digits than its factorization.

120512220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 120512220 is about 10977.8057916872. The cubic root of 120512220 is about 493.9432204297.

Adding to 120512220 its reverse (22215021), we get a palindrome (142727241).

The spelling of 120512220 in words is "one hundred twenty million, five hundred twelve thousand, two hundred twenty".