1312200312 has 64 divisors (see below), whose sum is σ = 3313612800. Its totient is φ = 433009920.

The previous prime is 1312200289. The next prime is 1312200319. The reversal of 1312200312 is 2130022131.

It is a super-3 number, since 3×1312200312³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312200291 and 1312200300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312200319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206633 + ... + 1207719.

It is an arithmetic number, because the mean of its divisors is an integer number (51775200).

Almost surely, 2^1312200312 is an apocalyptic number.

1312200312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312200312 is an abundant number, since it is smaller than the sum of its proper divisors (2001412488).

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

1312200312 is a wasteful number, since it uses less digits than its factorization.

1312200312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1312200312 is about 36224.3055419976. The cubic root of 1312200312 is about 1094.7964459726.

Adding to 1312200312 its reverse (2130022131), we get a palindrome (3442222443).

The spelling of 1312200312 in words is "one billion, three hundred twelve million, two hundred thousand, three hundred twelve".