10431442421 has 2 divisors, whose sum is σ = 10431442422. Its totient is φ = 10431442420.

The previous prime is 10431442393. The next prime is 10431442423. The reversal of 10431442421 is 12424413401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10421551396 + 9891025 = 102086^2 + 3145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10431442421 is a prime.

Together with 10431442423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10431442423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5215721210 + 5215721211.

It is an arithmetic number, because the mean of its divisors is an integer number (5215721211).

Almost surely, 2^10431442421 is an apocalyptic number.

It is an amenable number.

10431442421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10431442421 is an equidigital number, since it uses as much as digits as its factorization.

10431442421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 10431442421 its reverse (12424413401), we get a palindrome (22855855822).

The spelling of 10431442421 in words is "ten billion, four hundred thirty-one million, four hundred forty-two thousand, four hundred twenty-one".