1321413123 has 4 divisors (see below), whose sum is σ = 1761884168. Its totient is φ = 880942080.

The previous prime is 1321413109. The next prime is 1321413143. The reversal of 1321413123 is 3213141231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1321413123 - 2⁸ = 1321412867 is a prime.

It is a super-2 number, since 2×1321413123² = 3492265283273226258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321413123.

It is not an unprimeable number, because it can be changed into a prime (1321413103) 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, 220235518 + ... + 220235523.

It is an arithmetic number, because the mean of its divisors is an integer number (440471042).

Almost surely, 2^1321413123 is an apocalyptic number.

1321413123 is a deficient number, since it is larger than the sum of its proper divisors (440471045).

1321413123 is an equidigital number, since it uses as much as digits as its factorization.

1321413123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440471044.

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

The square root of 1321413123 is about 36351.2465123275. The cubic root of 1321413123 is about 1097.3526206936.

Adding to 1321413123 its reverse (3213141231), we get a palindrome (4534554354).

The spelling of 1321413123 in words is "one billion, three hundred twenty-one million, four hundred thirteen thousand, one hundred twenty-three".