221222202111 has 8 divisors (see below), whose sum is σ = 327736595760. Its totient is φ = 147481468056.

The previous prime is 221222202049. The next prime is 221222202217. The reversal of 221222202111 is 111202222122.

It is a happy number.

It is not a de Polignac number, because 221222202111 - 2¹¹ = 221222200063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222202811) 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, 4096707420 + ... + 4096707473.

It is an arithmetic number, because the mean of its divisors is an integer number (40967074470).

Almost surely, 2^221222202111 is an apocalyptic number.

221222202111 is a deficient number, since it is larger than the sum of its proper divisors (106514393649).

221222202111 is an equidigital number, since it uses as much as digits as its factorization.

221222202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8193414902 (or 8193414896 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221222202111 its reverse (111202222122), we get a palindrome (332424424233).

The spelling of 221222202111 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred eleven".