1231200312 has 32 divisors (see below), whose sum is σ = 3080160000. Its totient is φ = 410112224.

The previous prime is 1231200301. The next prime is 1231200317. The reversal of 1231200312 is 2130021321.

It is a junction number, because it is equal to n+sod(n) for n = 1231200291 and 1231200300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231200317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18439 + ... + 52937.

It is an arithmetic number, because the mean of its divisors is an integer number (96255000).

Almost surely, 2^1231200312 is an apocalyptic number.

1231200312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231200312 is an abundant number, since it is smaller than the sum of its proper divisors (1848959688).

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

1231200312 is a wasteful number, since it uses less digits than its factorization.

1231200312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35995 (or 35991 counting only the distinct ones).

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

The square root of 1231200312 is about 35088.4640872182. The cubic root of 1231200312 is about 1071.7896831594.

Adding to 1231200312 its reverse (2130021321), we get a palindrome (3361221633).

The spelling of 1231200312 in words is "one billion, two hundred thirty-one million, two hundred thousand, three hundred twelve".