20120012221000 has 128 divisors (see below), whose sum is σ = 47699076672000. Its totient is φ = 7942416768000.

The previous prime is 20120012220967. The next prime is 20120012221009. The reversal of 20120012221000 is 12221002102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20120012221009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172082560 + ... + 172199440.

It is an arithmetic number, because the mean of its divisors is an integer number (372649036500).

Almost surely, 2^{20120012221000} is an apocalyptic number.

20120012221000 is a gapful number since it is divisible by the number (20) 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 20120012221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23849538336000).

20120012221000 is an abundant number, since it is smaller than the sum of its proper divisors (27579064451000).

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

20120012221000 is a wasteful number, since it uses less digits than its factorization.

20120012221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119160 (or 119146 counting only the distinct ones).

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

Adding to 20120012221000 its reverse (12221002102), we get a palindrome (20132233223102).

The spelling of 20120012221000 in words is "twenty trillion, one hundred twenty billion, twelve million, two hundred twenty-one thousand".