12238566842 has 4 divisors (see below), whose sum is σ = 18357850266. Its totient is φ = 6119283420.

The previous prime is 12238566827. The next prime is 12238566889. The reversal of 12238566842 is 24866583221.

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., 12007557241 + 231009601 = 109579^2 + 15199^2 .

It is a super-2 number, since 2×12238566842² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3059641709 + ... + 3059641712.

Almost surely, 2^12238566842 is an apocalyptic number.

12238566842 is a deficient number, since it is larger than the sum of its proper divisors (6119283424).

12238566842 is an equidigital number, since it uses as much as digits as its factorization.

12238566842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119283423.

The product of its digits is 1105920, while the sum is 47.

The spelling of 12238566842 in words is "twelve billion, two hundred thirty-eight million, five hundred sixty-six thousand, eight hundred forty-two".