1213232312 has 32 divisors (see below), whose sum is σ = 2339064000. Its totient is φ = 589593600.

The previous prime is 1213232311. The next prime is 1213232329. The reversal of 1213232312 is 2132323121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213232311) 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, 82064 + ... + 95712.

It is an arithmetic number, because the mean of its divisors is an integer number (73095750).

Almost surely, 2^1213232312 is an apocalyptic number.

It is an amenable number.

1213232312 is a deficient number, since it is larger than the sum of its proper divisors (1125831688).

1213232312 is a wasteful number, since it uses less digits than its factorization.

1213232312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13967 (or 13963 counting only the distinct ones).

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

The square root of 1213232312 is about 34831.4844931995. The cubic root of 1213232312 is about 1066.5502523125.

Adding to 1213232312 its reverse (2132323121), we get a palindrome (3345555433).

It can be divided in two parts, 12132 and 32312, that added together give a palindrome (44444).

The spelling of 1213232312 in words is "one billion, two hundred thirteen million, two hundred thirty-two thousand, three hundred twelve".