13000021221 has 8 divisors (see below), whose sum is σ = 18909121824. Its totient is φ = 7878800720.

The previous prime is 13000021219. The next prime is 13000021241. The reversal of 13000021221 is 12212000031.

13000021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13000021221 - 2¹ = 13000021219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13000021197 and 13000021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13000021241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196969986 + ... + 196970051.

It is an arithmetic number, because the mean of its divisors is an integer number (2363640228).

Almost surely, 2^13000021221 is an apocalyptic number.

13000021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13000021221 is a deficient number, since it is larger than the sum of its proper divisors (5909100603).

13000021221 is a wasteful number, since it uses less digits than its factorization.

13000021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393940051.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 13000021221 its reverse (12212000031), we get a palindrome (25212021252).

The spelling of 13000021221 in words is "thirteen billion, twenty-one thousand, two hundred twenty-one".