13210030021 has 4 divisors (see below), whose sum is σ = 13211121600. Its totient is φ = 13208938444.

The previous prime is 13210030007. The next prime is 13210030037. The reversal of 13210030021 is 12003001231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12003001231 = 13 ⋅923307787.

It is a cyclic number.

It is not a de Polignac number, because 13210030021 - 2³¹ = 11062546373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13210029983 and 13210030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13210030121) 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, 527431 + ... + 551908.

It is an arithmetic number, because the mean of its divisors is an integer number (3302780400).

Almost surely, 2^13210030021 is an apocalyptic number.

It is an amenable number.

13210030021 is a deficient number, since it is larger than the sum of its proper divisors (1091579).

13210030021 is a wasteful number, since it uses less digits than its factorization.

13210030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091578.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 13210030021 its reverse (12003001231), we get a palindrome (25213031252).

The spelling of 13210030021 in words is "thirteen billion, two hundred ten million, thirty thousand, twenty-one".