13020203221 has 4 divisors (see below), whose sum is σ = 13185016000. Its totient is φ = 12855390444.

The previous prime is 13020203213. The next prime is 13020203269. The reversal of 13020203221 is 12230202031.

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: 12230202031 = 2837 ⋅4310963.

It is a cyclic number.

It is not a de Polignac number, because 13020203221 - 2³ = 13020203213 is a prime.

It is a super-2 number, since 2×13020203221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13020203195 and 13020203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020203281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82406271 + ... + 82406428.

It is an arithmetic number, because the mean of its divisors is an integer number (3296254000).

Almost surely, 2^13020203221 is an apocalyptic number.

It is an amenable number.

13020203221 is a deficient number, since it is larger than the sum of its proper divisors (164812779).

13020203221 is an equidigital number, since it uses as much as digits as its factorization.

13020203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164812778.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 13020203221 its reverse (12230202031), we get a palindrome (25250405252).

The spelling of 13020203221 in words is "thirteen billion, twenty million, two hundred three thousand, two hundred twenty-one".