2201312322221 has 4 divisors (see below), whose sum is σ = 2201777425692. Its totient is φ = 2200847218752.

The previous prime is 2201312322151. The next prime is 2201312322233. The reversal of 2201312322221 is 1222232131022.

It is a happy number.

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 343965828196 + 1857346494025 = 586486^2 + 1362845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201312322221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201312325221) 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, 232544636 + ... + 232554101.

It is an arithmetic number, because the mean of its divisors is an integer number (550444356423).

Almost surely, 2^{2201312322221} is an apocalyptic number.

It is an amenable number.

2201312322221 is a deficient number, since it is larger than the sum of its proper divisors (465103471).

2201312322221 is an equidigital number, since it uses as much as digits as its factorization.

2201312322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465103470.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2201312322221 its reverse (1222232131022), we get a palindrome (3423544453243).

The spelling of 2201312322221 in words is "two trillion, two hundred one billion, three hundred twelve million, three hundred twenty-two thousand, two hundred twenty-one".