12212100120220 has 192 divisors, whose sum is σ = 34435973246976. Its totient is φ = 3513267717120.

The previous prime is 12212100120203. The next prime is 12212100120221. The reversal of 12212100120220 is 2202100121221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12212100120194 and 12212100120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212100120221) 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, 343665574 + ... + 343701106.

It is an arithmetic number, because the mean of its divisors is an integer number (179354027328).

Almost surely, 2^{12212100120220} is an apocalyptic number.

12212100120220 is a gapful number since it is divisible by the number (10) 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 12212100120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17217986623488).

12212100120220 is an abundant number, since it is smaller than the sum of its proper divisors (22223873126756).

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

12212100120220 is a wasteful number, since it uses less digits than its factorization.

12212100120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52740 (or 52738 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12212100120220 its reverse (2202100121221), we get a palindrome (14414200241441).

It can be divided in two parts, 122121001 and 20220, that added together give a palindrome (122141221).

The spelling of 12212100120220 in words is "twelve trillion, two hundred twelve billion, one hundred million, one hundred twenty thousand, two hundred twenty".