10421043517 has 2 divisors, whose sum is σ = 10421043518. Its totient is φ = 10421043516.

The previous prime is 10421043511. The next prime is 10421043559. The reversal of 10421043517 is 71534012401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10077348996 + 343694521 = 100386^2 + 18539^2 .

It is a cyclic number.

It is not a de Polignac number, because 10421043517 - 2²⁷ = 10286825789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10421043511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210521758 + 5210521759.

It is an arithmetic number, because the mean of its divisors is an integer number (5210521759).

Almost surely, 2^10421043517 is an apocalyptic number.

It is an amenable number.

10421043517 is a deficient number, since it is larger than the sum of its proper divisors (1).

10421043517 is an equidigital number, since it uses as much as digits as its factorization.

10421043517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

Adding to 10421043517 its reverse (71534012401), we get a palindrome (81955055918).

The spelling of 10421043517 in words is "ten billion, four hundred twenty-one million, forty-three thousand, five hundred seventeen".