12443420331 has 6 divisors (see below), whose sum is σ = 17973829380. Its totient is φ = 8295613548.

The previous prime is 12443420323. The next prime is 12443420389. The reversal of 12443420331 is 13302434421.

12443420331 is a `hidden beast` number, since 1 + 24 + 434 + 203 + 3 + 1 = 666.

It is not a de Polignac number, because 12443420331 - 2³ = 12443420323 is a prime.

It is a super-2 number, since 2×12443420331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12443420295 and 12443420304.

It is not an unprimeable number, because it can be changed into a prime (12443422331) 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, 691301121 + ... + 691301138.

It is an arithmetic number, because the mean of its divisors is an integer number (2995638230).

Almost surely, 2^12443420331 is an apocalyptic number.

12443420331 is a deficient number, since it is larger than the sum of its proper divisors (5530409049).

12443420331 is a wasteful number, since it uses less digits than its factorization.

12443420331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382602265 (or 1382602262 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 12443420331 its reverse (13302434421), we get a palindrome (25745854752).

The spelling of 12443420331 in words is "twelve billion, four hundred forty-three million, four hundred twenty thousand, three hundred thirty-one".