1231323212 has 12 divisors (see below), whose sum is σ = 2462646480. Its totient is φ = 527709936.

The previous prime is 1231323199. The next prime is 1231323229. The reversal of 1231323212 is 2123231321.

1231323212 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21987887 + ... + 21987942.

It is an arithmetic number, because the mean of its divisors is an integer number (205220540).

Almost surely, 2^1231323212 is an apocalyptic number.

It is an amenable number.

1231323212 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.

1231323212 is a wasteful number, since it uses less digits than its factorization.

1231323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43975840 (or 43975838 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1231323212 is about 35090.2153313427. The cubic root of 1231323212 is about 1071.8253444481.

Adding to 1231323212 its reverse (2123231321), we get a palindrome (3354554533).

The spelling of 1231323212 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, two hundred twelve".