120100221220 has 24 divisors (see below), whose sum is σ = 288240531264. Its totient is φ = 41177218656.

The previous prime is 120100221217. The next prime is 120100221223. The reversal of 120100221220 is 22122001021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120100221217) and next prime (120100221223).

It is a self number, because there is not a number n which added to its sum of digits gives 120100221220.

It is not an unprimeable number, because it can be changed into a prime (120100221223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428929222 + ... + 428929501.

It is an arithmetic number, because the mean of its divisors is an integer number (12010022136).

Almost surely, 2^120100221220 is an apocalyptic number.

120100221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120100221220 is an abundant number, since it is smaller than the sum of its proper divisors (168140310044).

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

120100221220 is a wasteful number, since it uses less digits than its factorization.

120100221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857858739 (or 857858737 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 120100221220 its reverse (22122001021), we get a palindrome (142222222241).

The spelling of 120100221220 in words is "one hundred twenty billion, one hundred million, two hundred twenty-one thousand, two hundred twenty".