321321013 has 8 divisors (see below), whose sum is σ = 346815000. Its totient is φ = 295938048.

The previous prime is 321321001. The next prime is 321321023. The reversal of 321321013 is 310123123.

It can be written as a sum of positive squares in 4 ways, for example, as 72880369 + 248440644 = 8537^2 + 15762^2 .

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 321321013 - 2⁵ = 321320981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321321023) 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, 21688 + ... + 33361.

It is an arithmetic number, because the mean of its divisors is an integer number (43351875).

Almost surely, 2^321321013 is an apocalyptic number.

It is an amenable number.

321321013 is a deficient number, since it is larger than the sum of its proper divisors (25493987).

321321013 is a wasteful number, since it uses less digits than its factorization.

321321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55511.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321321013 is about 17925.4292277758. The cubic root of 321321013 is about 684.9302950010.

Adding to 321321013 its reverse (310123123), we get a palindrome (631444136).

The spelling of 321321013 in words is "three hundred twenty-one million, three hundred twenty-one thousand, thirteen".