12211021021220 has 96 divisors (see below), whose sum is σ = 29384765964288. Its totient is φ = 4175459263872.

The previous prime is 12211021021187. The next prime is 12211021021229. The reversal of 12211021021220 is 2212012011221.

It is not an unprimeable number, because it can be changed into a prime (12211021021229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104374397 + ... + 104491323.

It is an arithmetic number, because the mean of its divisors is an integer number (306091312128).

Almost surely, 2^{12211021021220} is an apocalyptic number.

12211021021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211021021220 is an abundant number, since it is smaller than the sum of its proper divisors (17173744943068).

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

12211021021220 is a wasteful number, since it uses less digits than its factorization.

12211021021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118929 (or 118927 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12211021021220 its reverse (2212012011221), we get a palindrome (14423033032441).

Subtracting from 12211021021220 its reverse (2212012011221), we obtain a palindrome (9999009009999).

The spelling of 12211021021220 in words is "twelve trillion, two hundred eleven billion, twenty-one million, twenty-one thousand, two hundred twenty".