13220303021 has 16 divisors (see below), whose sum is σ = 13723292160. Its totient is φ = 12727397760.

The previous prime is 13220303003. The next prime is 13220303029. The reversal of 13220303021 is 12030302231.

It is a cyclic number.

It is not a de Polignac number, because 13220303021 - 2⁶ = 13220302957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220303029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520675 + ... + 1529343.

It is an arithmetic number, because the mean of its divisors is an integer number (857705760).

Almost surely, 2^13220303021 is an apocalyptic number.

It is an amenable number.

13220303021 is a deficient number, since it is larger than the sum of its proper divisors (502989139).

13220303021 is an equidigital number, since it uses as much as digits as its factorization.

13220303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9244.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 13220303021 its reverse (12030302231), we get a palindrome (25250605252).

The spelling of 13220303021 in words is "thirteen billion, two hundred twenty million, three hundred three thousand, twenty-one".