20020121211112 has 64 divisors (see below), whose sum is σ = 41255097085440. Its totient is φ = 9032468625600.

The previous prime is 20020121211071. The next prime is 20020121211133. The reversal of 20020121211112 is 21111212102002.

It is a super-2 number, since 2×20020121211112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9169203 + ... + 11140669.

It is an arithmetic number, because the mean of its divisors is an integer number (644610891960).

Almost surely, 2^{20020121211112} is an apocalyptic number.

20020121211112 is a gapful number since it is divisible by the number (22) 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 20020121211112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20627548542720).

20020121211112 is an abundant number, since it is smaller than the sum of its proper divisors (21234975874328).

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

20020121211112 is a wasteful number, since it uses less digits than its factorization.

20020121211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972342 (or 1972338 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20020121211112 its reverse (21111212102002), we get a palindrome (41131333313114).

The spelling of 20020121211112 in words is "twenty trillion, twenty billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twelve".