213301321 has 4 divisors (see below), whose sum is σ = 213671572. Its totient is φ = 212931072.

The previous prime is 213301307. The next prime is 213301331. The reversal of 213301321 is 123103312.

213301321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 212838921 + 462400 = 14589^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 213301321 - 2⁵ = 213301289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213301295 and 213301304.

It is not an unprimeable number, because it can be changed into a prime (213301331) 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, 184260 + ... + 185413.

It is an arithmetic number, because the mean of its divisors is an integer number (53417893).

Almost surely, 2^213301321 is an apocalyptic number.

It is an amenable number.

213301321 is a deficient number, since it is larger than the sum of its proper divisors (370251).

213301321 is an equidigital number, since it uses as much as digits as its factorization.

213301321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370250.

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

The square root of 213301321 is about 14604.8389583727. The cubic root of 213301321 is about 597.4907438328.

Adding to 213301321 its reverse (123103312), we get a palindrome (336404633).

The spelling of 213301321 in words is "two hundred thirteen million, three hundred one thousand, three hundred twenty-one".