201221313 has 8 divisors (see below), whose sum is σ = 272074176. Its totient is φ = 132258000.

The previous prime is 201221309. The next prime is 201221323. The reversal of 201221313 is 313122102.

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

It is not a de Polignac number, because 201221313 - 2² = 201221309 is a prime.

It is a super-3 number, since 3×201221313³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201221292 and 201221301.

It is not an unprimeable number, because it can be changed into a prime (201221323) 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, 472138 + ... + 472563.

It is an arithmetic number, because the mean of its divisors is an integer number (34009272).

Almost surely, 2^201221313 is an apocalyptic number.

It is an amenable number.

201221313 is a deficient number, since it is larger than the sum of its proper divisors (70852863).

201221313 is an equidigital number, since it uses as much as digits as its factorization.

201221313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944775.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 201221313 is about 14185.2498391815. The cubic root of 201221313 is about 585.9915130766.

Adding to 201221313 its reverse (313122102), we get a palindrome (514343415).

The spelling of 201221313 in words is "two hundred one million, two hundred twenty-one thousand, three hundred thirteen".