1321243113 has 8 divisors (see below), whose sum is σ = 1761834528. Its totient is φ = 880740224.

The previous prime is 1321243093. The next prime is 1321243127. The reversal of 1321243113 is 3113421231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321243113 - 2¹⁶ = 1321177577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321243113.

It is not an unprimeable number, because it can be changed into a prime (1321243013) 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, 30745 + ... + 59897.

It is an arithmetic number, because the mean of its divisors is an integer number (220229316).

Almost surely, 2^1321243113 is an apocalyptic number.

It is an amenable number.

1321243113 is a deficient number, since it is larger than the sum of its proper divisors (440591415).

1321243113 is a wasteful number, since it uses less digits than its factorization.

1321243113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44263.

The product of its digits is 432, while the sum is 21.

The square root of 1321243113 is about 36348.9080028548. The cubic root of 1321243113 is about 1097.3055577130.

Adding to 1321243113 its reverse (3113421231), we get a palindrome (4434664344).

The spelling of 1321243113 in words is "one billion, three hundred twenty-one million, two hundred forty-three thousand, one hundred thirteen".