221222033221 has 8 divisors (see below), whose sum is σ = 258704836544. Its totient is φ = 185209143840.

The previous prime is 221222033191. The next prime is 221222033239. The reversal of 221222033221 is 122330222122.

221222033221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221222033221 - 2¹³ = 221222025029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221222033192 and 221222033201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222033281) 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 7 ways as a sum of consecutive naturals, for example, 367478160 + ... + 367478761.

It is an arithmetic number, because the mean of its divisors is an integer number (32338104568).

Almost surely, 2^221222033221 is an apocalyptic number.

It is an amenable number.

221222033221 is a deficient number, since it is larger than the sum of its proper divisors (37482803323).

221222033221 is an equidigital number, since it uses as much as digits as its factorization.

221222033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734956971.

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

Adding to 221222033221 its reverse (122330222122), we get a palindrome (343552255343).

The spelling of 221222033221 in words is "two hundred twenty-one billion, two hundred twenty-two million, thirty-three thousand, two hundred twenty-one".