122221211111 has 4 divisors (see below), whose sum is σ = 124527271752. Its totient is φ = 119915150472.

The previous prime is 122221211089. The next prime is 122221211117. The reversal of 122221211111 is 111112122221.

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 122221211111 - 2²⁶ = 122154102247 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 122221211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221211117) 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, 1153030241 + ... + 1153030346.

It is an arithmetic number, because the mean of its divisors is an integer number (31131817938).

Almost surely, 2^122221211111 is an apocalyptic number.

122221211111 is a deficient number, since it is larger than the sum of its proper divisors (2306060641).

122221211111 is an equidigital number, since it uses as much as digits as its factorization.

122221211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306060640.

The product of its digits is 32, while the sum is 17.

Adding to 122221211111 its reverse (111112122221), we get a palindrome (233333333332).

The spelling of 122221211111 in words is "one hundred twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".