20221120021212 has 288 divisors, whose sum is σ = 59630373863424. Its totient is φ = 5938996593600.

The previous prime is 20221120021187. The next prime is 20221120021309. The reversal of 20221120021212 is 21212002112202.

It is a happy number.

20221120021212 is a `hidden beast` number, since 20 + 2 + 211 + 200 + 21 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51564637 + ... + 51955307.

It is an arithmetic number, because the mean of its divisors is an integer number (207049909248).

Almost surely, 2^{20221120021212} is an apocalyptic number.

20221120021212 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 20221120021212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29815186931712).

20221120021212 is an abundant number, since it is smaller than the sum of its proper divisors (39409253842212).

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

20221120021212 is a wasteful number, since it uses less digits than its factorization.

20221120021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390851 (or 390837 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20221120021212 its reverse (21212002112202), we get a palindrome (41433122133414).

The spelling of 20221120021212 in words is "twenty trillion, two hundred twenty-one billion, one hundred twenty million, twenty-one thousand, two hundred twelve".