122111112018 has 16 divisors (see below), whose sum is σ = 279111113280. Its totient is φ = 34888889136.

The previous prime is 122111112017. The next prime is 122111112107. The reversal of 122111112018 is 810211111221.

It is a super-2 number, since 2×122111112018² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 122111111985 and 122111112003.

It is not an unprimeable number, because it can be changed into a prime (122111112017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453703673 + ... + 1453703756.

It is an arithmetic number, because the mean of its divisors is an integer number (17444444580).

Almost surely, 2^122111112018 is an apocalyptic number.

122111112018 is an abundant number, since it is smaller than the sum of its proper divisors (157000001262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122111112018 is a wasteful number, since it uses less digits than its factorization.

122111112018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907407441.

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

Adding to 122111112018 its reverse (810211111221), we get a palindrome (932322223239).

The spelling of 122111112018 in words is "one hundred twenty-two billion, one hundred eleven million, one hundred twelve thousand, eighteen".