10421134399 has 4 divisors (see below), whose sum is σ = 11222760136. Its totient is φ = 9619508664.

The previous prime is 10421134393. The next prime is 10421134417. The reversal of 10421134399 is 99343112401.

It is a happy number.

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 10421134399 - 2⁹ = 10421133887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421134393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400812849 + ... + 400812874.

It is an arithmetic number, because the mean of its divisors is an integer number (2805690034).

Almost surely, 2^10421134399 is an apocalyptic number.

10421134399 is a deficient number, since it is larger than the sum of its proper divisors (801625737).

10421134399 is an equidigital number, since it uses as much as digits as its factorization.

10421134399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801625736.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 10421134399 in words is "ten billion, four hundred twenty-one million, one hundred thirty-four thousand, three hundred ninety-nine".