4001343420421 has 4 divisors (see below), whose sum is σ = 4015482443392. Its totient is φ = 3987204397452.

The previous prime is 4001343420343. The next prime is 4001343420433. The reversal of 4001343420421 is 1240243431004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4001343420421 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 4001343420421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001343420461) 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, 7069511061 + ... + 7069511626.

It is an arithmetic number, because the mean of its divisors is an integer number (1003870610848).

Almost surely, 2^{4001343420421} is an apocalyptic number.

It is an amenable number.

4001343420421 is a deficient number, since it is larger than the sum of its proper divisors (14139022971).

4001343420421 is a wasteful number, since it uses less digits than its factorization.

4001343420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14139022970.

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

Adding to 4001343420421 its reverse (1240243431004), we get a palindrome (5241586851425).

The spelling of 4001343420421 in words is "four trillion, one billion, three hundred forty-three million, four hundred twenty thousand, four hundred twenty-one".