21033302303233 has 4 divisors (see below), whose sum is σ = 22945420694448. Its totient is φ = 19121183912020.

The previous prime is 21033302303227. The next prime is 21033302303249. The reversal of 21033302303233 is 33230320333012.

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 21033302303233 - 2⁹ = 21033302302721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033302303333) 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, 956059195591 + ... + 956059195612.

It is an arithmetic number, because the mean of its divisors is an integer number (5736355173612).

Almost surely, 2^{21033302303233} is an apocalyptic number.

It is an amenable number.

21033302303233 is a deficient number, since it is larger than the sum of its proper divisors (1912118391215).

21033302303233 is a wasteful number, since it uses less digits than its factorization.

21033302303233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912118391214.

The product of its (nonzero) digits is 17496, while the sum is 28.

Adding to 21033302303233 its reverse (33230320333012), we get a palindrome (54263622636245).

The spelling of 21033302303233 in words is "twenty-one trillion, thirty-three billion, three hundred two million, three hundred three thousand, two hundred thirty-three".