12243121140 has 48 divisors (see below), whose sum is σ = 34542446400. Its totient is φ = 3239907840.

The previous prime is 12243121129. The next prime is 12243121157. The reversal of 12243121140 is 4112134221.

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, 770965 + ... + 786684.

It is an arithmetic number, because the mean of its divisors is an integer number (719634300).

Almost surely, 2^12243121140 is an apocalyptic number.

12243121140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12243121140 is an abundant number, since it is smaller than the sum of its proper divisors (22299325260).

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

12243121140 is a wasteful number, since it uses less digits than its factorization.

12243121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1557792 (or 1557790 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12243121140 its reverse (4112134221), we get a palindrome (16355255361).

The spelling of 12243121140 in words is "twelve billion, two hundred forty-three million, one hundred twenty-one thousand, one hundred forty".