122221222111 has 4 divisors (see below), whose sum is σ = 122464207152. Its totient is φ = 121978237072.

The previous prime is 122221222091. The next prime is 122221222147. The reversal of 122221222111 is 111222122221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122221222111 - 2¹¹ = 122221220063 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 (122221222171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121491766 + ... + 121492771.

It is an arithmetic number, because the mean of its divisors is an integer number (30616051788).

Almost surely, 2^122221222111 is an apocalyptic number.

122221222111 is a deficient number, since it is larger than the sum of its proper divisors (242985041).

122221222111 is an equidigital number, since it uses as much as digits as its factorization.

122221222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242985040.

The product of its digits is 128, while the sum is 19.

Adding to 122221222111 its reverse (111222122221), we get a palindrome (233443344332).

The spelling of 122221222111 in words is "one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".