122112111111 has 4 divisors (see below), whose sum is σ = 162816148152. Its totient is φ = 81408074072.

The previous prime is 122112111059. The next prime is 122112111151. The reversal of 122112111111 is 111111211221.

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 122112111111 - 2⁹ = 122112110599 is a prime.

It is a super-2 number, since 2×122112111111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122112111151) 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, 20352018516 + ... + 20352018521.

It is an arithmetic number, because the mean of its divisors is an integer number (40704037038).

Almost surely, 2^122112111111 is an apocalyptic number.

122112111111 is a deficient number, since it is larger than the sum of its proper divisors (40704037041).

122112111111 is an equidigital number, since it uses as much as digits as its factorization.

122112111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40704037040.

The product of its digits is 8, while the sum is 15.

Adding to 122112111111 its reverse (111111211221), we get a palindrome (233223322332).

The spelling of 122112111111 in words is "one hundred twenty-two billion, one hundred twelve million, one hundred eleven thousand, one hundred eleven".