221200221311 has 4 divisors (see below), whose sum is σ = 222323065272. Its totient is φ = 220077377352.

The previous prime is 221200221269. The next prime is 221200221313. The reversal of 221200221311 is 113122002122.

221200221311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113122002122 = 2 ⋅56561001061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200221311 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 221200221311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200221313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561421685 + ... + 561422078.

It is an arithmetic number, because the mean of its divisors is an integer number (55580766318).

Almost surely, 2^221200221311 is an apocalyptic number.

221200221311 is a deficient number, since it is larger than the sum of its proper divisors (1122843961).

221200221311 is a wasteful number, since it uses less digits than its factorization.

221200221311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122843960.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221200221311 its reverse (113122002122), we get a palindrome (334322223433).

The spelling of 221200221311 in words is "two hundred twenty-one billion, two hundred million, two hundred twenty-one thousand, three hundred eleven".