12403212431 has 4 divisors (see below), whose sum is σ = 12560215200. Its totient is φ = 12246209664.

The previous prime is 12403212377. The next prime is 12403212433. The reversal of 12403212431 is 13421230421.

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

It is a cyclic number.

It is not a de Polignac number, because 12403212431 - 2²² = 12399018127 is a prime.

It is a super-2 number, since 2×12403212431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12403212397 and 12403212406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403212433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78501266 + ... + 78501423.

It is an arithmetic number, because the mean of its divisors is an integer number (3140053800).

Almost surely, 2^12403212431 is an apocalyptic number.

12403212431 is a deficient number, since it is larger than the sum of its proper divisors (157002769).

12403212431 is an equidigital number, since it uses as much as digits as its factorization.

12403212431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157002768.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12403212431 its reverse (13421230421), we get a palindrome (25824442852).

The spelling of 12403212431 in words is "twelve billion, four hundred three million, two hundred twelve thousand, four hundred thirty-one".