12142434321 has 24 divisors (see below), whose sum is σ = 18574820160. Its totient is φ = 7627425696.

The previous prime is 12142434307. The next prime is 12142434347. The reversal of 12142434321 is 12343424121.

It is not a de Polignac number, because 12142434321 - 2⁶ = 12142434257 is a prime.

It is a super-2 number, since 2×12142434321² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12142434301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 423886 + ... + 451623.

It is an arithmetic number, because the mean of its divisors is an integer number (773950840).

Almost surely, 2^12142434321 is an apocalyptic number.

It is an amenable number.

12142434321 is a deficient number, since it is larger than the sum of its proper divisors (6432385839).

12142434321 is a wasteful number, since it uses less digits than its factorization.

12142434321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875605 (or 875602 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 12142434321 its reverse (12343424121), we get a palindrome (24485858442).

The spelling of 12142434321 in words is "twelve billion, one hundred forty-two million, four hundred thirty-four thousand, three hundred twenty-one".