12121145322 has 64 divisors (see below), whose sum is σ = 28623974400. Its totient is φ = 3373444800.

The previous prime is 12121145321. The next prime is 12121145353. The reversal of 12121145322 is 22354112121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12121145292 and 12121145301.

It is not an unprimeable number, because it can be changed into a prime (12121145321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135247 + ... + 206237.

It is an arithmetic number, because the mean of its divisors is an integer number (447249600).

Almost surely, 2^12121145322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121145322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14311987200).

12121145322 is an abundant number, since it is smaller than the sum of its proper divisors (16502829078).

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

12121145322 is a wasteful number, since it uses less digits than its factorization.

12121145322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71219.

The product of its digits is 960, while the sum is 24.

Adding to 12121145322 its reverse (22354112121), we get a palindrome (34475257443).

The spelling of 12121145322 in words is "twelve billion, one hundred twenty-one million, one hundred forty-five thousand, three hundred twenty-two".