201310220321 has 4 divisors (see below), whose sum is σ = 230068823232. Its totient is φ = 172551617412.

The previous prime is 201310220311. The next prime is 201310220329. The reversal of 201310220321 is 123022013102.

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.

It is a cyclic number.

It is not a de Polignac number, because 201310220321 - 2²² = 201306026017 is a prime.

It is a super-2 number, since 2×201310220321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201310220321.

It is not an unprimeable number, because it can be changed into a prime (201310220329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14379301445 + ... + 14379301458.

It is an arithmetic number, because the mean of its divisors is an integer number (57517205808).

Almost surely, 2^201310220321 is an apocalyptic number.

It is an amenable number.

201310220321 is a deficient number, since it is larger than the sum of its proper divisors (28758602911).

201310220321 is an equidigital number, since it uses as much as digits as its factorization.

201310220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28758602910.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 201310220321 its reverse (123022013102), we get a palindrome (324332233423).

The spelling of 201310220321 in words is "two hundred one billion, three hundred ten million, two hundred twenty thousand, three hundred twenty-one".