12120221000 has 64 divisors (see below), whose sum is σ = 28377648000. Its totient is φ = 4845297600.

The previous prime is 12120220993. The next prime is 12120221039. The reversal of 12120221000 is 12202121.

It is a happy number.

12120221000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3257141 + ... + 3260859.

It is an arithmetic number, because the mean of its divisors is an integer number (443400750).

Almost surely, 2^12120221000 is an apocalyptic number.

12120221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120221000 is an abundant number, since it is smaller than the sum of its proper divisors (16257427000).

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

12120221000 is a wasteful number, since it uses less digits than its factorization.

12120221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12120221000 its reverse (12202121), we get a palindrome (12132423121).

The spelling of 12120221000 in words is "twelve billion, one hundred twenty million, two hundred twenty-one thousand".