20212201221212 has 192 divisors, whose sum is σ = 50113292544000. Its totient is φ = 6874947256320.

The previous prime is 20212201221211. The next prime is 20212201221253. The reversal of 20212201221212 is 21212210221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212201221211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6963164 + ... + 9429212.

It is an arithmetic number, because the mean of its divisors is an integer number (261006732000).

Almost surely, 2^{20212201221212} is an apocalyptic number.

20212201221212 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 20212201221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25056646272000).

20212201221212 is an abundant number, since it is smaller than the sum of its proper divisors (29901091322788).

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

20212201221212 is a wasteful number, since it uses less digits than its factorization.

20212201221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466196 (or 2466194 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20212201221212 its reverse (21212210221202), we get a palindrome (41424411442414).

The spelling of 20212201221212 in words is "twenty trillion, two hundred twelve billion, two hundred one million, two hundred twenty-one thousand, two hundred twelve".