1213130312 has 16 divisors (see below), whose sum is σ = 2278233600. Its totient is φ = 605601360.

The previous prime is 1213130311. The next prime is 1213130323. The reversal of 1213130312 is 2130313121.

It is not an unprimeable number, because it can be changed into a prime (1213130311) 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 3 ways as a sum of consecutive naturals, for example, 115112 + ... + 125207.

It is an arithmetic number, because the mean of its divisors is an integer number (142389600).

Almost surely, 2^1213130312 is an apocalyptic number.

It is an amenable number.

1213130312 is a deficient number, since it is larger than the sum of its proper divisors (1065103288).

1213130312 is a wasteful number, since it uses less digits than its factorization.

1213130312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240956 (or 240952 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1213130312 is about 34830.0202698764. The cubic root of 1213130312 is about 1066.5203621386.

Adding to 1213130312 its reverse (2130313121), we get a palindrome (3343443433).

The spelling of 1213130312 in words is "one billion, two hundred thirteen million, one hundred thirty thousand, three hundred twelve".