12000121122 has 64 divisors (see below), whose sum is σ = 26770341888. Its totient is φ = 3554880000.

The previous prime is 12000121079. The next prime is 12000121123. The reversal of 12000121122 is 22112100021.

It is a junction number, because it is equal to n+sod(n) for n = 12000121098 and 12000121107.

It is not an unprimeable number, because it can be changed into a prime (12000121123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3568722 + ... + 3572082.

It is an arithmetic number, because the mean of its divisors is an integer number (418286592).

Almost surely, 2^12000121122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12000121122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13385170944).

12000121122 is an abundant number, since it is smaller than the sum of its proper divisors (14770220766).

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

12000121122 is a wasteful number, since it uses less digits than its factorization.

12000121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12000121122 its reverse (22112100021), we get a palindrome (34112221143).

The spelling of 12000121122 in words is "twelve billion, one hundred twenty-one thousand, one hundred twenty-two".