12142243231 has 4 divisors (see below), whose sum is σ = 12155933232. Its totient is φ = 12128553232.

The previous prime is 12142243229. The next prime is 12142243249. The reversal of 12142243231 is 13234224121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12142243231 - 2¹ = 12142243229 is a prime.

It is a super-2 number, since 2×12142243231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12142243196 and 12142243205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142243291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6843670 + ... + 6845443.

It is an arithmetic number, because the mean of its divisors is an integer number (3038983308).

Almost surely, 2^12142243231 is an apocalyptic number.

12142243231 is a deficient number, since it is larger than the sum of its proper divisors (13690001).

12142243231 is an equidigital number, since it uses as much as digits as its factorization.

12142243231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13690000.

The product of its digits is 2304, while the sum is 25.

Adding to 12142243231 its reverse (13234224121), we get a palindrome (25376467352).

The spelling of 12142243231 in words is "twelve billion, one hundred forty-two million, two hundred forty-three thousand, two hundred thirty-one".