1321230312 has 32 divisors (see below), whose sum is σ = 3670084800. Its totient is φ = 440410032.

The previous prime is 1321230283. The next prime is 1321230347. The reversal of 1321230312 is 2130321231.

1321230312 is a `hidden beast` number, since 1 + 321 + 2 + 30 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058188 + ... + 3058619.

It is an arithmetic number, because the mean of its divisors is an integer number (114690150).

Almost surely, 2^1321230312 is an apocalyptic number.

1321230312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321230312 is an abundant number, since it is smaller than the sum of its proper divisors (2348854488).

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

1321230312 is a wasteful number, since it uses less digits than its factorization.

1321230312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116822 (or 6116812 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1321230312 is about 36348.7319173585. The cubic root of 1321230312 is about 1097.3020139156.

Adding to 1321230312 its reverse (2130321231), we get a palindrome (3451551543).

The spelling of 1321230312 in words is "one billion, three hundred twenty-one million, two hundred thirty thousand, three hundred twelve".