221222032221 has 32 divisors (see below), whose sum is σ = 309984860160. Its totient is φ = 140062824000.

The previous prime is 221222032139. The next prime is 221222032247. The reversal of 221222032221 is 122230222122.

It is not a de Polignac number, because 221222032221 - 2¹⁰ = 221222031197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222032271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26366295 + ... + 26374683.

It is an arithmetic number, because the mean of its divisors is an integer number (9687026880).

Almost surely, 2^221222032221 is an apocalyptic number.

It is an amenable number.

221222032221 is a deficient number, since it is larger than the sum of its proper divisors (88762827939).

221222032221 is a wasteful number, since it uses less digits than its factorization.

221222032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11097.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221222032221 its reverse (122230222122), we get a palindrome (343452254343).

The spelling of 221222032221 in words is "two hundred twenty-one billion, two hundred twenty-two million, thirty-two thousand, two hundred twenty-one".