10243420123399 has 4 divisors (see below), whose sum is σ = 10258964008920. Its totient is φ = 10227876237880.

The previous prime is 10243420123369. The next prime is 10243420123403. The reversal of 10243420123399 is 99332102434201.

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 10243420123399 - 2⁵ = 10243420123367 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 (10243420123369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7771941772 + ... + 7771943089.

It is an arithmetic number, because the mean of its divisors is an integer number (2564741002230).

Almost surely, 2^{10243420123399} is an apocalyptic number.

10243420123399 is a deficient number, since it is larger than the sum of its proper divisors (15543885521).

10243420123399 is an equidigital number, since it uses as much as digits as its factorization.

10243420123399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15543885520.

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 10243420123399 in words is "ten trillion, two hundred forty-three billion, four hundred twenty million, one hundred twenty-three thousand, three hundred ninety-nine".