221200230311 has 4 divisors (see below), whose sum is σ = 227178614952. Its totient is φ = 215221845672.

The previous prime is 221200230287. The next prime is 221200230323. The reversal of 221200230311 is 113032002122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200230311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221200230311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200260311) 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, 2989192265 + ... + 2989192338.

It is an arithmetic number, because the mean of its divisors is an integer number (56794653738).

Almost surely, 2^221200230311 is an apocalyptic number.

221200230311 is a deficient number, since it is larger than the sum of its proper divisors (5978384641).

221200230311 is an equidigital number, since it uses as much as digits as its factorization.

221200230311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978384640.

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

Adding to 221200230311 its reverse (113032002122), we get a palindrome (334232232433).

The spelling of 221200230311 in words is "two hundred twenty-one billion, two hundred million, two hundred thirty thousand, three hundred eleven".