21330232213 has 8 divisors (see below), whose sum is σ = 21474250200. Its totient is φ = 21186663168.

The previous prime is 21330232201. The next prime is 21330232237. The reversal of 21330232213 is 31223203312.

It can be written as a sum of positive squares in 4 ways, for example, as 12020491044 + 9309741169 = 109638^2 + 96487^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330232213 is a prime.

It is a super-3 number, since 3×21330232213³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330232613) 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, 16618 + ... + 207211.

It is an arithmetic number, because the mean of its divisors is an integer number (2684281275).

Almost surely, 2^21330232213 is an apocalyptic number.

It is an amenable number.

21330232213 is a deficient number, since it is larger than the sum of its proper divisors (144017987).

21330232213 is a wasteful number, since it uses less digits than its factorization.

21330232213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224471.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21330232213 its reverse (31223203312), we get a palindrome (52553435525).

The spelling of 21330232213 in words is "twenty-one billion, three hundred thirty million, two hundred thirty-two thousand, two hundred thirteen".