221222012111 has 8 divisors (see below), whose sum is σ = 224994220560. Its totient is φ = 217450559872.

The previous prime is 221222012083. The next prime is 221222012117. The reversal of 221222012111 is 111210222122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222012111 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 221222012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222012117) 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, 417461 + ... + 785313.

It is an arithmetic number, because the mean of its divisors is an integer number (28124277570).

Almost surely, 2^221222012111 is an apocalyptic number.

221222012111 is a deficient number, since it is larger than the sum of its proper divisors (3772208449).

221222012111 is a wasteful number, since it uses less digits than its factorization.

221222012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378105.

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

Adding to 221222012111 its reverse (111210222122), we get a palindrome (332432234233).

The spelling of 221222012111 in words is "two hundred twenty-one billion, two hundred twenty-two million, twelve thousand, one hundred eleven".