12120231220 has 48 divisors (see below), whose sum is σ = 26144633088. Its totient is φ = 4717450880.

The previous prime is 12120231139. The next prime is 12120231239. The reversal of 12120231220 is 2213202121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12120231194 and 12120231203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125355 + ... + 199885.

It is an arithmetic number, because the mean of its divisors is an integer number (544679856).

Almost surely, 2^12120231220 is an apocalyptic number.

12120231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120231220 is an abundant number, since it is smaller than the sum of its proper divisors (14024401868).

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

12120231220 is a wasteful number, since it uses less digits than its factorization.

12120231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74760 (or 74758 counting only the distinct ones).

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

Adding to 12120231220 its reverse (2213202121), we get a palindrome (14333433341).

The spelling of 12120231220 in words is "twelve billion, one hundred twenty million, two hundred thirty-one thousand, two hundred twenty".