201223212100321 has 4 divisors (see below), whose sum is σ = 213059871635652. Its totient is φ = 189386552564992.

The previous prime is 201223212100279. The next prime is 201223212100363. The reversal of 201223212100321 is 123001212322102.

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

It is an interprime number because it is at equal distance from previous prime (201223212100279) and next prime (201223212100363).

It can be written as a sum of positive squares in 2 ways, for example, as 153131220144400 + 48091991955921 = 12374620^2 + 6934839^2 .

It is a cyclic number.

It is not a de Polignac number, because 201223212100321 - 2¹³ = 201223212092129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201223212100292 and 201223212100301.

It is not an unprimeable number, because it can be changed into a prime (201223212110321) 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, 5918329767640 + ... + 5918329767673.

It is an arithmetic number, because the mean of its divisors is an integer number (53264967908913).

Almost surely, 2^{201223212100321} is an apocalyptic number.

It is an amenable number.

201223212100321 is a deficient number, since it is larger than the sum of its proper divisors (11836659535331).

201223212100321 is a wasteful number, since it uses less digits than its factorization.

201223212100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11836659535330.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 201223212100321 its reverse (123001212322102), we get a palindrome (324224424422423).

The spelling of 201223212100321 in words is "two hundred one trillion, two hundred twenty-three billion, two hundred twelve million, one hundred thousand, three hundred twenty-one".