21333123033 has 4 divisors (see below), whose sum is σ = 28444164048. Its totient is φ = 14222082020.

The previous prime is 21333123017. The next prime is 21333123059. The reversal of 21333123033 is 33032133312.

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 21333123033 - 2⁴ = 21333123017 is a prime.

It is a super-2 number, since 2×21333123033² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21333122994 and 21333123012.

It is not an unprimeable number, because it can be changed into a prime (21333123533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555520503 + ... + 3555520508.

It is an arithmetic number, because the mean of its divisors is an integer number (7111041012).

Almost surely, 2^21333123033 is an apocalyptic number.

It is an amenable number.

21333123033 is a deficient number, since it is larger than the sum of its proper divisors (7111041015).

21333123033 is an equidigital number, since it uses as much as digits as its factorization.

21333123033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7111041014.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21333123033 its reverse (33032133312), we get a palindrome (54365256345).

The spelling of 21333123033 in words is "twenty-one billion, three hundred thirty-three million, one hundred twenty-three thousand, thirty-three".