12123133443 has 6 divisors (see below), whose sum is σ = 17511192764. Its totient is φ = 8082088956.

The previous prime is 12123133357. The next prime is 12123133447. The reversal of 12123133443 is 34433132121.

It is a happy number.

12123133443 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 313 + 344 + 3 = 666.

It is not a de Polignac number, because 12123133443 - 2¹³ = 12123125251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123133447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673507405 + ... + 673507422.

Almost surely, 2^12123133443 is an apocalyptic number.

12123133443 is a deficient number, since it is larger than the sum of its proper divisors (5388059321).

12123133443 is a wasteful number, since it uses less digits than its factorization.

12123133443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347014833 (or 1347014830 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 12123133443 its reverse (34433132121), we get a palindrome (46556265564).

The spelling of 12123133443 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-three thousand, four hundred forty-three".