321112013 has 4 divisors (see below), whose sum is σ = 321465408. Its totient is φ = 320758620.

The previous prime is 321112009. The next prime is 321112067. The reversal of 321112013 is 310211123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310211123 = 17053 ⋅18191.

It is a cyclic number.

It is not a de Polignac number, because 321112013 - 2² = 321112009 is a prime.

It is a super-2 number, since 2×321112013² = 206225849785824338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321112073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175331 + ... + 177152.

It is an arithmetic number, because the mean of its divisors is an integer number (80366352).

Almost surely, 2^321112013 is an apocalyptic number.

It is an amenable number.

321112013 is a deficient number, since it is larger than the sum of its proper divisors (353395).

321112013 is an equidigital number, since it uses as much as digits as its factorization.

321112013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353394.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 321112013 is about 17919.5985725127. The cubic root of 321112013 is about 684.7817608000.

Adding to 321112013 its reverse (310211123), we get a palindrome (631323136).

The spelling of 321112013 in words is "three hundred twenty-one million, one hundred twelve thousand, thirteen".