21233023033213 has 4 divisors (see below), whose sum is σ = 21420925892028. Its totient is φ = 21045120174400.

The previous prime is 21233023033199. The next prime is 21233023033217. The reversal of 21233023033213 is 31233032033212.

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 10071724265604 + 11161298767609 = 3173598^2 + 3340853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21233023033213 is a prime.

It is a super-2 number, since 2×21233023033213² (a number of 27 digits) contains 22 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 (21233023033217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93951429238 + ... + 93951429463.

It is an arithmetic number, because the mean of its divisors is an integer number (5355231473007).

Almost surely, 2^{21233023033213} is an apocalyptic number.

It is an amenable number.

21233023033213 is a deficient number, since it is larger than the sum of its proper divisors (187902858815).

21233023033213 is a wasteful number, since it uses less digits than its factorization.

21233023033213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187902858814.

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 21233023033213 its reverse (31233032033212), we get a palindrome (52466055066425).

It can be divided in two parts, 2123302 and 3033213, that added together give a palindrome (5156515).

The spelling of 21233023033213 in words is "twenty-one trillion, two hundred thirty-three billion, twenty-three million, thirty-three thousand, two hundred thirteen".