221222424032221 has 8 divisors (see below), whose sum is σ = 221323681087488. Its totient is φ = 221121173070000.

The previous prime is 221222424032189. The next prime is 221222424032249. The reversal of 221222424032221 is 122230424222122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 221222424032221 - 2⁵ = 221222424032189 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 (221222424032261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71917611 + ... + 74930551.

It is an arithmetic number, because the mean of its divisors is an integer number (27665460135936).

Almost surely, 2^{221222424032221} is an apocalyptic number.

It is an amenable number.

221222424032221 is a deficient number, since it is larger than the sum of its proper divisors (101257055267).

221222424032221 is a wasteful number, since it uses less digits than its factorization.

221222424032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046523.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 221222424032221 its reverse (122230424222122), we get a palindrome (343452848254343).

The spelling of 221222424032221 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, four hundred twenty-four million, thirty-two thousand, two hundred twenty-one".