221221403302 has 16 divisors (see below), whose sum is σ = 346387441392. Its totient is φ = 105856938720.

The previous prime is 221221403297. The next prime is 221221403321. The reversal of 221221403302 is 203304122122.

221221403302 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×221221403302³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 24499408 + ... + 24508435.

It is an arithmetic number, because the mean of its divisors is an integer number (21649215087).

Almost surely, 2^221221403302 is an apocalyptic number.

221221403302 is a deficient number, since it is larger than the sum of its proper divisors (125166038090).

221221403302 is a wasteful number, since it uses less digits than its factorization.

221221403302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49007943.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221221403302 its reverse (203304122122), we get a palindrome (424525525424).

The spelling of 221221403302 in words is "two hundred twenty-one billion, two hundred twenty-one million, four hundred three thousand, three hundred two".