10002004421 has 2 divisors, whose sum is σ = 10002004422. Its totient is φ = 10002004420.

The previous prime is 10002004409. The next prime is 10002004423. The reversal of 10002004421 is 12440020001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7682522500 + 2319481921 = 87650^2 + 48161^2 .

It is an emirp because it is prime and its reverse (12440020001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10002004421 is a prime.

Together with 10002004423, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 10002004396 and 10002004405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002004423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001002210 + 5001002211.

It is an arithmetic number, because the mean of its divisors is an integer number (5001002211).

Almost surely, 2^10002004421 is an apocalyptic number.

It is an amenable number.

10002004421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002004421 is an equidigital number, since it uses as much as digits as its factorization.

10002004421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 10002004421 its reverse (12440020001), we get a palindrome (22442024422).

The spelling of 10002004421 in words is "ten billion, two million, four thousand, four hundred twenty-one".