12201122120220 has 384 divisors, whose sum is σ = 41964120576000. Its totient is φ = 2918520357120.

The previous prime is 12201122120197. The next prime is 12201122120227. The reversal of 12201122120220 is 2202122110221.

It is a happy number.

12201122120220 is a `hidden beast` number, since 1 + 2 + 201 + 1 + 221 + 20 + 220 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 12201122120193 and 12201122120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201122120227) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 134537251 + ... + 134627909.

It is an arithmetic number, because the mean of its divisors is an integer number (109281564000).

Almost surely, 2^{12201122120220} is an apocalyptic number.

12201122120220 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 12201122120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20982060288000).

12201122120220 is an abundant number, since it is smaller than the sum of its proper divisors (29762998455780).

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

12201122120220 is a wasteful number, since it uses less digits than its factorization.

12201122120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90990 (or 90982 counting only the distinct ones).

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

Adding to 12201122120220 its reverse (2202122110221), we get a palindrome (14403244230441).

Subtracting from 12201122120220 its reverse (2202122110221), we obtain a palindrome (9999000009999).

The spelling of 12201122120220 in words is "twelve trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twenty".