13210003420421 has 4 divisors (see below), whose sum is σ = 13210370329632. Its totient is φ = 13209636511212.

The previous prime is 13210003420417. The next prime is 13210003420429. The reversal of 13210003420421 is 12402430001231.

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 not a de Polignac number, because 13210003420421 - 2² = 13210003420417 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 (13210003420429) 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, 183400595 + ... + 183472608.

It is an arithmetic number, because the mean of its divisors is an integer number (3302592582408).

Almost surely, 2^{13210003420421} is an apocalyptic number.

It is an amenable number.

13210003420421 is a deficient number, since it is larger than the sum of its proper divisors (366909211).

13210003420421 is an equidigital number, since it uses as much as digits as its factorization.

13210003420421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366909210.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 13210003420421 its reverse (12402430001231), we get a palindrome (25612433421652).

The spelling of 13210003420421 in words is "thirteen trillion, two hundred ten billion, three million, four hundred twenty thousand, four hundred twenty-one".