21013200233 has 4 divisors (see below), whose sum is σ = 22119158160. Its totient is φ = 19907242308.

The previous prime is 21013200211. The next prime is 21013200287. The reversal of 21013200233 is 33200231012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21013200233 - 2¹⁰ = 21013199209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013200203) 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, 552978935 + ... + 552978972.

It is an arithmetic number, because the mean of its divisors is an integer number (5529789540).

Almost surely, 2^21013200233 is an apocalyptic number.

It is an amenable number.

21013200233 is a deficient number, since it is larger than the sum of its proper divisors (1105957927).

21013200233 is a wasteful number, since it uses less digits than its factorization.

21013200233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105957926.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21013200233 its reverse (33200231012), we get a palindrome (54213431245).

The spelling of 21013200233 in words is "twenty-one billion, thirteen million, two hundred thousand, two hundred thirty-three".