12121021122 has 80 divisors (see below), whose sum is σ = 28430911872. Its totient is φ = 3444762720.

The previous prime is 12121021057. The next prime is 12121021127. The reversal of 12121021122 is 22112012121.

It is not an unprimeable number, because it can be changed into a prime (12121021127) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2835847 + ... + 2840117.

Almost surely, 2^12121021122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121021122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14215455936).

12121021122 is an abundant number, since it is smaller than the sum of its proper divisors (16309890750).

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

12121021122 is an equidigital number, since it uses as much as digits as its factorization.

12121021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501 (or 4480 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12121021122 its reverse (22112012121), we get a palindrome (34233033243).

Subtracting 12121021122 from its reverse (22112012121), we obtain a palindrome (9990990999).

The spelling of 12121021122 in words is "twelve billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-two".