122222111112111 has 4 divisors (see below), whose sum is σ = 162962814816152. Its totient is φ = 81481407408072.

The previous prime is 122222111112097. The next prime is 122222111112131. The reversal of 122222111112111 is 111211111222221.

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

It is not a de Polignac number, because 122222111112111 - 2³⁰ = 122221037370287 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 (122222111112131) 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, 20370351852016 + ... + 20370351852021.

It is an arithmetic number, because the mean of its divisors is an integer number (40740703704038).

Almost surely, 2^{122222111112111} is an apocalyptic number.

122222111112111 is a deficient number, since it is larger than the sum of its proper divisors (40740703704041).

122222111112111 is an equidigital number, since it uses as much as digits as its factorization.

122222111112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40740703704040.

The product of its digits is 64, while the sum is 21.

Adding to 122222111112111 its reverse (111211111222221), we get a palindrome (233433222334332).

It can be divided in two parts, 1222221 and 11112111, that multiplied together give a palindrome (13581455418531).

The spelling of 122222111112111 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, one hundred eleven million, one hundred twelve thousand, one hundred eleven".