122122111111111 has 4 divisors (see below), whose sum is σ = 122122464359224. Its totient is φ = 122121757863000.

The previous prime is 122122111111079. The next prime is 122122111111151. The reversal of 122122111111111 is 111111111221221.

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 122122111111111 - 2⁵ = 122122111111079 is a prime.

It is a Duffinian number.

122122111111111 is a modest number, since divided by 11111111 gives 1221221 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122111111151) 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, 176104980 + ... + 176797081.

It is an arithmetic number, because the mean of its divisors is an integer number (30530616089806).

Almost surely, 2^{122122111111111} is an apocalyptic number.

122122111111111 is a deficient number, since it is larger than the sum of its proper divisors (353248113).

122122111111111 is an equidigital number, since it uses as much as digits as its factorization.

122122111111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353248112.

The product of its digits is 16, while the sum is 19.

Adding to 122122111111111 its reverse (111111111221221), we get a palindrome (233233222332332).

The spelling of 122122111111111 in words is "one hundred twenty-two trillion, one hundred twenty-two billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".