21332013213 has 8 divisors (see below), whose sum is σ = 32505924928. Its totient is φ = 12189721824.

The previous prime is 21332013191. The next prime is 21332013223. The reversal of 21332013213 is 31231023312.

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

It is not a de Polignac number, because 21332013213 - 2⁸ = 21332012957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1015810153 = 21332013213 / (2 + 1 + 3 + 3 + 2 + 0 + 1 + 3 + 2 + 1 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21332013213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332013223) 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, 507905056 + ... + 507905097.

It is an arithmetic number, because the mean of its divisors is an integer number (4063240616).

Almost surely, 2^21332013213 is an apocalyptic number.

It is an amenable number.

21332013213 is a deficient number, since it is larger than the sum of its proper divisors (11173911715).

21332013213 is a wasteful number, since it uses less digits than its factorization.

21332013213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015810163.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21332013213 its reverse (31231023312), we get a palindrome (52563036525).

The spelling of 21332013213 in words is "twenty-one billion, three hundred thirty-two million, thirteen thousand, two hundred thirteen".