13221130021 has 8 divisors (see below), whose sum is σ = 14466629088. Its totient is φ = 11982894000.

The previous prime is 13221129949. The next prime is 13221130037. The reversal of 13221130021 is 12003112231.

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

It is not a de Polignac number, because 13221130021 - 2²⁹ = 12684259109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221129977 and 13221130004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221130121) 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, 1811950 + ... + 1819231.

It is an arithmetic number, because the mean of its divisors is an integer number (1808328636).

Almost surely, 2^13221130021 is an apocalyptic number.

13221130021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13221130021 is a deficient number, since it is larger than the sum of its proper divisors (1245499067).

13221130021 is a wasteful number, since it uses less digits than its factorization.

13221130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3631523.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13221130021 its reverse (12003112231), we get a palindrome (25224242252).

The spelling of 13221130021 in words is "thirteen billion, two hundred twenty-one million, one hundred thirty thousand, twenty-one".