13201322021 has 4 divisors (see below), whose sum is σ = 13203217344. Its totient is φ = 13199426700.

The previous prime is 13201322009. The next prime is 13201322047. The reversal of 13201322021 is 12022310231.

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: 12022310231 = 619 ⋅19422149.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13201322021 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 (13201324021) 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, 937175 + ... + 951156.

It is an arithmetic number, because the mean of its divisors is an integer number (3300804336).

Almost surely, 2^13201322021 is an apocalyptic number.

It is an amenable number.

13201322021 is a deficient number, since it is larger than the sum of its proper divisors (1895323).

13201322021 is an equidigital number, since it uses as much as digits as its factorization.

13201322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895322.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13201322021 its reverse (12022310231), we get a palindrome (25223632252).

The spelling of 13201322021 in words is "thirteen billion, two hundred one million, three hundred twenty-two thousand, twenty-one".