2221311323201 has 4 divisors (see below), whose sum is σ = 2351976695172. Its totient is φ = 2090645951232.

The previous prime is 2221311323131. The next prime is 2221311323207. The reversal of 2221311323201 is 1023231131222.

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 1497688887601 + 723622435600 = 1223801^2 + 850660^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221311323201 - 2²² = 2221307128897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221311323207) 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, 65332685960 + ... + 65332685993.

It is an arithmetic number, because the mean of its divisors is an integer number (587994173793).

Almost surely, 2^{2221311323201} is an apocalyptic number.

It is an amenable number.

2221311323201 is a deficient number, since it is larger than the sum of its proper divisors (130665371971).

2221311323201 is a wasteful number, since it uses less digits than its factorization.

2221311323201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130665371970.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2221311323201 its reverse (1023231131222), we get a palindrome (3244542454423).

The spelling of 2221311323201 in words is "two trillion, two hundred twenty-one billion, three hundred eleven million, three hundred twenty-three thousand, two hundred one".