12021351324 has 48 divisors (see below), whose sum is σ = 29080386720. Its totient is φ = 3860496640.

The previous prime is 12021351283. The next prime is 12021351341. The reversal of 12021351324 is 42315312021.

It is a junction number, because it is equal to n+sod(n) for n = 12021351294 and 12021351303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122962 + ... + 197894.

It is an arithmetic number, because the mean of its divisors is an integer number (605841390).

Almost surely, 2^12021351324 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 12021351324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14540193360).

12021351324 is an abundant number, since it is smaller than the sum of its proper divisors (17059035396).

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

12021351324 is a wasteful number, since it uses less digits than its factorization.

12021351324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75430 (or 75428 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12021351324 its reverse (42315312021), we get a palindrome (54336663345).

The spelling of 12021351324 in words is "twelve billion, twenty-one million, three hundred fifty-one thousand, three hundred twenty-four".