20020211221220 has 96 divisors (see below), whose sum is σ = 50597551065600. Its totient is φ = 6505399194624.

The previous prime is 20020211221211. The next prime is 20020211221249. The reversal of 20020211221220 is 2212211202002.

It is a happy number.

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, 28169465 + ... + 28871424.

It is an arithmetic number, because the mean of its divisors is an integer number (527057823600).

Almost surely, 2^{20020211221220} is an apocalyptic number.

20020211221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020211221220 is an abundant number, since it is smaller than the sum of its proper divisors (30577339844380).

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

20020211221220 is a wasteful number, since it uses less digits than its factorization.

20020211221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57041037 (or 57041035 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20020211221220 its reverse (2212211202002), we get a palindrome (22232422423222).

The spelling of 20020211221220 in words is "twenty trillion, twenty billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty".