12231220231220 has 24 divisors (see below), whose sum is σ = 25712685611424. Its totient is φ = 4887321782816.

The previous prime is 12231220231169. The next prime is 12231220231229. The reversal of 12231220231220 is 2213202213221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231220231229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322874942 + ... + 322912821.

It is an arithmetic number, because the mean of its divisors is an integer number (1071361900476).

Almost surely, 2^{12231220231220} is an apocalyptic number.

12231220231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12231220231220 is an abundant number, since it is smaller than the sum of its proper divisors (13481465380204).

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

12231220231220 is a wasteful number, since it uses less digits than its factorization.

12231220231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645788719 (or 645788717 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12231220231220 its reverse (2213202213221), we get a palindrome (14444422444441).

The spelling of 12231220231220 in words is "twelve trillion, two hundred thirty-one billion, two hundred twenty million, two hundred thirty-one thousand, two hundred twenty".