13215222021 has 8 divisors (see below), whose sum is σ = 17781950560. Its totient is φ = 8729320752.

The previous prime is 13215222001. The next prime is 13215222067. The reversal of 13215222021 is 12022251231.

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

It is not a de Polignac number, because 13215222021 - 2¹¹ = 13215219973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20206435 + ... + 20207088.

It is an arithmetic number, because the mean of its divisors is an integer number (2222743820).

Almost surely, 2^13215222021 is an apocalyptic number.

It is an amenable number.

13215222021 is a deficient number, since it is larger than the sum of its proper divisors (4566728539).

13215222021 is a wasteful number, since it uses less digits than its factorization.

13215222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40413635.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 13215222021 its reverse (12022251231), we get a palindrome (25237473252).

The spelling of 13215222021 in words is "thirteen billion, two hundred fifteen million, two hundred twenty-two thousand, twenty-one".