12231543212 has 12 divisors (see below), whose sum is σ = 24463086480. Its totient is φ = 5242089936.

The previous prime is 12231543187. The next prime is 12231543217. The reversal of 12231543212 is 21234513221.

12231543212 is an admirable number.

It is a super-2 number, since 2×12231543212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12231543217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218420387 + ... + 218420442.

It is an arithmetic number, because the mean of its divisors is an integer number (2038590540).

Almost surely, 2^12231543212 is an apocalyptic number.

It is an amenable number.

12231543212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12231543212 is a wasteful number, since it uses less digits than its factorization.

12231543212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436840840 (or 436840838 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The spelling of 12231543212 in words is "twelve billion, two hundred thirty-one million, five hundred forty-three thousand, two hundred twelve".