21233013313 has 8 divisors (see below), whose sum is σ = 21360242088. Its totient is φ = 21105836544.

The previous prime is 21233013157. The next prime is 21233013337. The reversal of 21233013313 is 31331033212.

It can be written as a sum of positive squares in 4 ways, for example, as 17542207809 + 3690805504 = 132447^2 + 60752^2 .

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-21233013313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233010313) 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, 1076145 + ... + 1095697.

It is an arithmetic number, because the mean of its divisors is an integer number (2670030261).

Almost surely, 2^21233013313 is an apocalyptic number.

It is an amenable number.

21233013313 is a deficient number, since it is larger than the sum of its proper divisors (127228775).

21233013313 is a wasteful number, since it uses less digits than its factorization.

21233013313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26003.

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

Adding to 21233013313 its reverse (31331033212), we get a palindrome (52564046525).

The spelling of 21233013313 in words is "twenty-one billion, two hundred thirty-three million, thirteen thousand, three hundred thirteen".