12220001221000 has 128 divisors (see below), whose sum is σ = 30512121868800. Its totient is φ = 4567302028800.

The previous prime is 12220001220989. The next prime is 12220001221061. The reversal of 12220001221000 is 12210002221.

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, 3018192 + ... + 5792191.

It is an arithmetic number, because the mean of its divisors is an integer number (238375952100).

Almost surely, 2^{12220001221000} is an apocalyptic number.

12220001221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220001221000 is an abundant number, since it is smaller than the sum of its proper divisors (18292120647800).

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

12220001221000 is a wasteful number, since it uses less digits than its factorization.

12220001221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8810496 (or 8810482 counting only the distinct ones).

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

Adding to 12220001221000 its reverse (12210002221), we get a palindrome (12232211223221).

The spelling of 12220001221000 in words is "twelve trillion, two hundred twenty billion, one million, two hundred twenty-one thousand".