12231120220 has 96 divisors (see below), whose sum is σ = 29957630976. Its totient is φ = 4145280000.

The previous prime is 12231120197. The next prime is 12231120227. The reversal of 12231120220 is 2202113221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12231120194 and 12231120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231120227) 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, 369345 + ... + 401095.

It is an arithmetic number, because the mean of its divisors is an integer number (312058656).

Almost surely, 2^12231120220 is an apocalyptic number.

12231120220 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 12231120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14978815488).

12231120220 is an abundant number, since it is smaller than the sum of its proper divisors (17726510756).

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

12231120220 is a wasteful number, since it uses less digits than its factorization.

12231120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31891 (or 31889 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12231120220 its reverse (2202113221), we get a palindrome (14433233441).

The spelling of 12231120220 in words is "twelve billion, two hundred thirty-one million, one hundred twenty thousand, two hundred twenty".