12121111122 has 8 divisors (see below), whose sum is σ = 24242222256. Its totient is φ = 4040370372.

The previous prime is 12121111117. The next prime is 12121111127. The reversal of 12121111122 is 22111112121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12121111117) and next prime (12121111127).

It is a sphenic number, since it is the product of 3 distinct primes.

12121111122 is an admirable number.

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

It is not an unprimeable number, because it can be changed into a prime (12121111127) 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, 1010092588 + ... + 1010092599.

It is an arithmetic number, because the mean of its divisors is an integer number (3030277782).

Almost surely, 2^12121111122 is an apocalyptic number.

12121111122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12121111122 is a wasteful number, since it uses less digits than its factorization.

12121111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020185192.

The product of its digits is 16, while the sum is 15.

Adding to 12121111122 its reverse (22111112121), we get a palindrome (34232223243).

Subtracting 12121111122 from its reverse (22111112121), we obtain a palindrome (9990000999).

The spelling of 12121111122 in words is "twelve billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty-two".