120101220 has 36 divisors (see below), whose sum is σ = 364307580. Its totient is φ = 32026944.

The previous prime is 120101203. The next prime is 120101227. The reversal of 120101220 is 22101021.

It can be written as a sum of positive squares in 2 ways, for example, as 75585636 + 44515584 = 8694^2 + 6672^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (120101227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333435 + ... + 333794.

It is an arithmetic number, because the mean of its divisors is an integer number (10119655).

Almost surely, 2^120101220 is an apocalyptic number.

120101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120101220 is an abundant number, since it is smaller than the sum of its proper divisors (244206360).

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

120101220 is a wasteful number, since it uses less digits than its factorization.

120101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667244 (or 667239 counting only the distinct ones).

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

The square root of 120101220 is about 10959.0702160357. The cubic root of 120101220 is about 493.3810592169.

Adding to 120101220 its reverse (22101021), we get a palindrome (142202241).

The spelling of 120101220 in words is "one hundred twenty million, one hundred one thousand, two hundred twenty".