12120122221000 has 128 divisors (see below), whose sum is σ = 29442745987200. Its totient is φ = 4664331436800.

The previous prime is 12120122220991. The next prime is 12120122221037. The reversal of 12120122221000 is 12222102121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7468599 + ... + 8945401.

It is an arithmetic number, because the mean of its divisors is an integer number (230021453025).

Almost surely, 2^{12120122221000} is an apocalyptic number.

12120122221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120122221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14721372993600).

12120122221000 is an abundant number, since it is smaller than the sum of its proper divisors (17322623766200).

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

12120122221000 is a wasteful number, since it uses less digits than its factorization.

12120122221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477136 (or 1477122 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12120122221000 its reverse (12222102121), we get a palindrome (12132344323121).

The spelling of 12120122221000 in words is "twelve trillion, one hundred twenty billion, one hundred twenty-two million, two hundred twenty-one thousand".