221244213403 has 16 divisors (see below), whose sum is σ = 231698918880. Its totient is φ = 210989753856.

The previous prime is 221244213391. The next prime is 221244213497. The reversal of 221244213403 is 304312442122.

221244213403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221244213403 - 2¹³ = 221244205211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221244213803) 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 15 ways as a sum of consecutive naturals, for example, 939925 + ... + 1151497.

It is an arithmetic number, because the mean of its divisors is an integer number (14481182430).

Almost surely, 2^221244213403 is an apocalyptic number.

221244213403 is a deficient number, since it is larger than the sum of its proper divisors (10454705477).

221244213403 is a wasteful number, since it uses less digits than its factorization.

221244213403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212046.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221244213403 its reverse (304312442122), we get a palindrome (525556655525).

The spelling of 221244213403 in words is "two hundred twenty-one billion, two hundred forty-four million, two hundred thirteen thousand, four hundred three".