12120020221220 has 24 divisors (see below), whose sum is σ = 25453295078904. Its totient is φ = 4847769495296.

The previous prime is 12120020221213. The next prime is 12120020221241. The reversal of 12120020221220 is 2212202002121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8643376561444 + 3476643659776 = 2939962^2 + 1864576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14495249 + ... + 15308568.

It is an arithmetic number, because the mean of its divisors is an integer number (1060553961621).

Almost surely, 2^{12120020221220} is an apocalyptic number.

12120020221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120020221220 is an abundant number, since it is smaller than the sum of its proper divisors (13333274857684).

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

12120020221220 is a wasteful number, since it uses less digits than its factorization.

12120020221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29824159 (or 29824157 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12120020221220 its reverse (2212202002121), we get a palindrome (14332222223341).

The spelling of 12120020221220 in words is "twelve trillion, one hundred twenty billion, twenty million, two hundred twenty-one thousand, two hundred twenty".