221222120111 has 8 divisors (see below), whose sum is σ = 224684672400. Its totient is φ = 217781277120.

The previous prime is 221222120089. The next prime is 221222120129. The reversal of 221222120111 is 111021222122.

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 221222120111 - 2¹⁰ = 221222119087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221222120111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222120611) 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, 5406785 + ... + 5447546.

It is an arithmetic number, because the mean of its divisors is an integer number (28085584050).

Almost surely, 2^221222120111 is an apocalyptic number.

221222120111 is a deficient number, since it is larger than the sum of its proper divisors (3462552289).

221222120111 is a wasteful number, since it uses less digits than its factorization.

221222120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10854649.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221222120111 its reverse (111021222122), we get a palindrome (332243342233).

The spelling of 221222120111 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, one hundred eleven".