12131433442 has 4 divisors (see below), whose sum is σ = 18197150166. Its totient is φ = 6065716720.

The previous prime is 12131433407. The next prime is 12131433473. The reversal of 12131433442 is 24433413121.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 11370170161 + 761263281 = 106631^2 + 27591^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12131433442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3032858359 + ... + 3032858362.

Almost surely, 2^12131433442 is an apocalyptic number.

12131433442 is a deficient number, since it is larger than the sum of its proper divisors (6065716724).

12131433442 is an equidigital number, since it uses as much as digits as its factorization.

12131433442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065716723.

The product of its digits is 6912, while the sum is 28.

Adding to 12131433442 its reverse (24433413121), we get a palindrome (36564846563).

The spelling of 12131433442 in words is "twelve billion, one hundred thirty-one million, four hundred thirty-three thousand, four hundred forty-two".