1231243212 has 24 divisors (see below), whose sum is σ = 2927108016. Its totient is φ = 402670528.

The previous prime is 1231243201. The next prime is 1231243217. The reversal of 1231243212 is 2123421321.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1231243217) 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, 967323 + ... + 968594.

It is an arithmetic number, because the mean of its divisors is an integer number (121962834).

Almost surely, 2^1231243212 is an apocalyptic number.

1231243212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231243212 is an abundant number, since it is smaller than the sum of its proper divisors (1695864804).

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

1231243212 is a wasteful number, since it uses less digits than its factorization.

1231243212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935977 (or 1935975 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1231243212 is about 35089.0753939171. The cubic root of 1231243212 is about 1071.8021315110.

Adding to 1231243212 its reverse (2123421321), we get a palindrome (3354664533).

The spelling of 1231243212 in words is "one billion, two hundred thirty-one million, two hundred forty-three thousand, two hundred twelve".