20120211221000 has 128 divisors (see below), whose sum is σ = 51938508960000. Its totient is φ = 7234232896000.

The previous prime is 20120211220987. The next prime is 20120211221021. The reversal of 20120211221000 is 12211202102.

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 31 ways as a sum of consecutive naturals, for example, 9296900 + ... + 11254899.

It is an arithmetic number, because the mean of its divisors is an integer number (405769601250).

Almost surely, 2^{20120211221000} is an apocalyptic number.

20120211221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120211221000 is an abundant number, since it is smaller than the sum of its proper divisors (31818297739000).

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

20120211221000 is a wasteful number, since it uses less digits than its factorization.

20120211221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20551920 (or 20551906 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20120211221000 its reverse (12211202102), we get a palindrome (20132422423102).

The spelling of 20120211221000 in words is "twenty trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand".