12201020121220 has 48 divisors (see below), whose sum is σ = 29694877164288. Its totient is φ = 4124288488320.

The previous prime is 12201020121211. The next prime is 12201020121229. The reversal of 12201020121220 is 2212102010221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12201020121211) and next prime (12201020121229).

It is a junction number, because it is equal to n+sod(n) for n = 12201020121194 and 12201020121203.

It is not an unprimeable number, because it can be changed into a prime (12201020121229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613723467 + ... + 613743346.

It is an arithmetic number, because the mean of its divisors is an integer number (618643274256).

Almost surely, 2^{12201020121220} is an apocalyptic number.

12201020121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12201020121220 is an abundant number, since it is smaller than the sum of its proper divisors (17493857043068).

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

12201020121220 is a wasteful number, since it uses less digits than its factorization.

12201020121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227466900 (or 1227466898 counting only the distinct ones).

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

Adding to 12201020121220 its reverse (2212102010221), we get a palindrome (14413122131441).

The spelling of 12201020121220 in words is "twelve trillion, two hundred one billion, twenty million, one hundred twenty-one thousand, two hundred twenty".