111121212122 has 4 divisors (see below), whose sum is σ = 166681818186. Its totient is φ = 55560606060.

The previous prime is 111121212101. The next prime is 111121212143. The reversal of 111121212122 is 221212121111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221212121111 = 79159 ⋅2794529.

It is an interprime number because it is at equal distance from previous prime (111121212101) and next prime (111121212143).

It can be written as a sum of positive squares in only one way, i.e., 110908314841 + 212897281 = 333029^2 + 14591^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 111121212122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27780303029 + ... + 27780303032.

Almost surely, 2^111121212122 is an apocalyptic number.

111121212122 is a deficient number, since it is larger than the sum of its proper divisors (55560606064).

111121212122 is an equidigital number, since it uses as much as digits as its factorization.

111121212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55560606063.

The product of its digits is 32, while the sum is 17.

Adding to 111121212122 its reverse (221212121111), we get a palindrome (332333333233).

The spelling of 111121212122 in words is "one hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".