12142231345 has 4 divisors (see below), whose sum is σ = 14570677620. Its totient is φ = 9713785072.

The previous prime is 12142231307. The next prime is 12142231379. The reversal of 12142231345 is 54313224121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3138688576 + 9003542769 = 56024^2 + 94887^2 .

It is a cyclic number.

It is not a de Polignac number, because 12142231345 - 2⁷ = 12142231217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214223130 + ... + 1214223139.

It is an arithmetic number, because the mean of its divisors is an integer number (3642669405).

Almost surely, 2^12142231345 is an apocalyptic number.

It is an amenable number.

12142231345 is a deficient number, since it is larger than the sum of its proper divisors (2428446275).

12142231345 is an equidigital number, since it uses as much as digits as its factorization.

12142231345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428446274.

The product of its digits is 5760, while the sum is 28.

Adding to 12142231345 its reverse (54313224121), we get a palindrome (66455455466).

The spelling of 12142231345 in words is "twelve billion, one hundred forty-two million, two hundred thirty-one thousand, three hundred forty-five".