221221200439 has 4 divisors (see below), whose sum is σ = 221235753424. Its totient is φ = 221206647456.

The previous prime is 221221200427. The next prime is 221221200509. The reversal of 221221200439 is 934002122122.

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

It is a cyclic number.

It is not a de Polignac number, because 221221200439 - 2¹¹ = 221221198391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221260439) 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, 7253667 + ... + 7284100.

It is an arithmetic number, because the mean of its divisors is an integer number (55308938356).

Almost surely, 2^221221200439 is an apocalyptic number.

221221200439 is a deficient number, since it is larger than the sum of its proper divisors (14552985).

221221200439 is a wasteful number, since it uses less digits than its factorization.

221221200439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14552984.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 221221200439 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, four hundred thirty-nine".