120311220 has 48 divisors (see below), whose sum is σ = 345094848. Its totient is φ = 31299840.

The previous prime is 120311201. The next prime is 120311237. The reversal of 120311220 is 22113021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 120311196 and 120311205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21994 + ... + 26913.

It is an arithmetic number, because the mean of its divisors is an integer number (7189476).

Almost surely, 2^120311220 is an apocalyptic number.

120311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120311220 is an abundant number, since it is smaller than the sum of its proper divisors (224783628).

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

120311220 is a wasteful number, since it uses less digits than its factorization.

120311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48960 (or 48958 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 120311220 is about 10968.6471362698. The cubic root of 120311220 is about 493.6684548342.

Adding to 120311220 its reverse (22113021), we get a palindrome (142424241).

The spelling of 120311220 in words is "one hundred twenty million, three hundred eleven thousand, two hundred twenty".