1231213332 has 24 divisors (see below), whose sum is σ = 2950476256. Its totient is φ = 399312288.

The previous prime is 1231213327. The next prime is 1231213339. The reversal of 1231213332 is 2333121321.

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

It is a junction number, because it is equal to n+sod(n) for n = 1231213299 and 1231213308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231213339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386058 + ... + 1386945.

Almost surely, 2^1231213332 is an apocalyptic number.

1231213332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231213332 is an abundant number, since it is smaller than the sum of its proper divisors (1719262924).

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

1231213332 is a wasteful number, since it uses less digits than its factorization.

1231213332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773047 (or 2773045 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1231213332 is about 35088.6496177895. The cubic root of 1231213332 is about 1071.7934612211.

Adding to 1231213332 its reverse (2333121321), we get a palindrome (3564334653).

The spelling of 1231213332 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, three hundred thirty-two".