12421223431 has 2 divisors, whose sum is σ = 12421223432. Its totient is φ = 12421223430.

The previous prime is 12421223411. The next prime is 12421223447. The reversal of 12421223431 is 13432212421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12421223431 - 2¹¹ = 12421221383 is a prime.

It is a super-2 number, since 2×12421223431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12421223396 and 12421223405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421223411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210611715 + 6210611716.

It is an arithmetic number, because the mean of its divisors is an integer number (6210611716).

Almost surely, 2^12421223431 is an apocalyptic number.

12421223431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421223431 is an equidigital number, since it uses as much as digits as its factorization.

12421223431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

Adding to 12421223431 its reverse (13432212421), we get a palindrome (25853435852).

The spelling of 12421223431 in words is "twelve billion, four hundred twenty-one million, two hundred twenty-three thousand, four hundred thirty-one".