12422121344 has 128 divisors (see below), whose sum is σ = 25846840800. Its totient is φ = 5943435264.

The previous prime is 12422121337. The next prime is 12422121347. The reversal of 12422121344 is 44312122421.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12422121347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79121714 + ... + 79121870.

Almost surely, 2^12422121344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12422121344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12923420400).

12422121344 is an abundant number, since it is smaller than the sum of its proper divisors (13424719456).

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

12422121344 is a wasteful number, since it uses less digits than its factorization.

12422121344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 428 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 12422121344 its reverse (44312122421), we get a palindrome (56734243765).

The spelling of 12422121344 in words is "twelve billion, four hundred twenty-two million, one hundred twenty-one thousand, three hundred forty-four".