21133302033 has 4 divisors (see below), whose sum is σ = 28177736048. Its totient is φ = 14088868020.

The previous prime is 21133302019. The next prime is 21133302077. The reversal of 21133302033 is 33020333112.

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 de Polignac number, because none of the positive numbers 2^k-21133302033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21133302833) 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, 3522217003 + ... + 3522217008.

It is an arithmetic number, because the mean of its divisors is an integer number (7044434012).

Almost surely, 2^21133302033 is an apocalyptic number.

It is an amenable number.

21133302033 is a deficient number, since it is larger than the sum of its proper divisors (7044434015).

21133302033 is an equidigital number, since it uses as much as digits as its factorization.

21133302033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7044434014.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21133302033 its reverse (33020333112), we get a palindrome (54153635145).

The spelling of 21133302033 in words is "twenty-one billion, one hundred thirty-three million, three hundred two thousand, thirty-three".