10340043042421 has 4 divisors (see below), whose sum is σ = 10415517809292. Its totient is φ = 10264568275552.

The previous prime is 10340043042409. The next prime is 10340043042449. The reversal of 10340043042421 is 12424034004301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8783073140625 + 1556969901796 = 2963625^2 + 1247786^2 .

It is a cyclic number.

It is not a de Polignac number, because 10340043042421 - 2²⁵ = 10340009487989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10340043042421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10340043042451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37737383230 + ... + 37737383503.

It is an arithmetic number, because the mean of its divisors is an integer number (2603879452323).

Almost surely, 2^{10340043042421} is an apocalyptic number.

It is an amenable number.

10340043042421 is a deficient number, since it is larger than the sum of its proper divisors (75474766871).

10340043042421 is an equidigital number, since it uses as much as digits as its factorization.

10340043042421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75474766870.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 10340043042421 its reverse (12424034004301), we get a palindrome (22764077046722).

The spelling of 10340043042421 in words is "ten trillion, three hundred forty billion, forty-three million, forty-two thousand, four hundred twenty-one".