21303133310233 has 4 divisors (see below), whose sum is σ = 21339424849680. Its totient is φ = 21266841770788.

The previous prime is 21303133310213. The next prime is 21303133310257. The reversal of 21303133310233 is 33201333130312.

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 21303133310233 - 2¹³ = 21303133302041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303133310203) 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, 18145768843 + ... + 18145770016.

It is an arithmetic number, because the mean of its divisors is an integer number (5334856212420).

Almost surely, 2^{21303133310233} is an apocalyptic number.

It is an amenable number.

21303133310233 is a deficient number, since it is larger than the sum of its proper divisors (36291539447).

21303133310233 is an equidigital number, since it uses as much as digits as its factorization.

21303133310233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36291539446.

The product of its (nonzero) digits is 8748, while the sum is 28.

Adding to 21303133310233 its reverse (33201333130312), we get a palindrome (54504466440545).

The spelling of 21303133310233 in words is "twenty-one trillion, three hundred three billion, one hundred thirty-three million, three hundred ten thousand, two hundred thirty-three".