122222122111111 has 16 divisors (see below), whose sum is σ = 134563015255680. Its totient is φ = 110086293408480.

The previous prime is 122222122111097. The next prime is 122222122111139. The reversal of 122222122111111 is 111111221222221.

It is a cyclic number.

It is not a de Polignac number, because 122222122111111 - 2⁴¹ = 120023098855559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222122111211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22260820 + ... + 27202726.

It is an arithmetic number, because the mean of its divisors is an integer number (8410188453480).

Almost surely, 2^{122222122111111} is an apocalyptic number.

122222122111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122222122111111 is a deficient number, since it is larger than the sum of its proper divisors (12340893144569).

122222122111111 is a wasteful number, since it uses less digits than its factorization.

122222122111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962654.

The product of its digits is 128, while the sum is 22.

Adding to 122222122111111 its reverse (111111221222221), we get a palindrome (233333343333332).

It can be divided in two parts, 1222221 and 22111111, that added together give a palindrome (23333332).

The spelling of 122222122111111 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-two million, one hundred eleven thousand, one hundred eleven".