21233310313 has 4 divisors (see below), whose sum is σ = 21421215828. Its totient is φ = 21045404800.

The previous prime is 21233310257. The next prime is 21233310317. The reversal of 21233310313 is 31301333212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5854086144 + 15379224169 = 76512^2 + 124013^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233310313 - 2¹³ = 21233302121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233310317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93952588 + ... + 93952813.

It is an arithmetic number, because the mean of its divisors is an integer number (5355303957).

Almost surely, 2^21233310313 is an apocalyptic number.

It is an amenable number.

21233310313 is a deficient number, since it is larger than the sum of its proper divisors (187905515).

21233310313 is a wasteful number, since it uses less digits than its factorization.

21233310313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187905514.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21233310313 its reverse (31301333212), we get a palindrome (52534643525).

The spelling of 21233310313 in words is "twenty-one billion, two hundred thirty-three million, three hundred ten thousand, three hundred thirteen".