1004342131421 has 2 divisors, whose sum is σ = 1004342131422. Its totient is φ = 1004342131420.

The previous prime is 1004342131417. The next prime is 1004342131493. The reversal of 1004342131421 is 1241312434001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793505042521 + 210837088900 = 890789^2 + 459170^2 .

It is an emirp because it is prime and its reverse (1241312434001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1004342131421 - 2² = 1004342131417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004342131621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502171065710 + 502171065711.

It is an arithmetic number, because the mean of its divisors is an integer number (502171065711).

Almost surely, 2^{1004342131421} is an apocalyptic number.

It is an amenable number.

1004342131421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004342131421 is an equidigital number, since it uses as much as digits as its factorization.

1004342131421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1004342131421 its reverse (1241312434001), we get a palindrome (2245654565422).

The spelling of 1004342131421 in words is "one trillion, four billion, three hundred forty-two million, one hundred thirty-one thousand, four hundred twenty-one".