13020211221 has 8 divisors (see below), whose sum is σ = 17367177984. Its totient is φ = 8676692640.

The previous prime is 13020211201. The next prime is 13020211223. The reversal of 13020211221 is 12211202031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13020211221 - 2²¹ = 13018114069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13020211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020211223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853221 + ... + 868346.

It is an arithmetic number, because the mean of its divisors is an integer number (2170897248).

Almost surely, 2^13020211221 is an apocalyptic number.

It is an amenable number.

13020211221 is a deficient number, since it is larger than the sum of its proper divisors (4346966763).

13020211221 is a wasteful number, since it uses less digits than its factorization.

13020211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724091.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 13020211221 its reverse (12211202031), we get a palindrome (25231413252).

The spelling of 13020211221 in words is "thirteen billion, twenty million, two hundred eleven thousand, two hundred twenty-one".