21120332033 has 4 divisors (see below), whose sum is σ = 21145092948. Its totient is φ = 21095571120.

The previous prime is 21120332003. The next prime is 21120332047. The reversal of 21120332033 is 33023302112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3081693169 + 18038638864 = 55513^2 + 134308^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120332033 - 2¹² = 21120327937 is a prime.

It is a super-3 number, since 3×21120332033³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21120331996 and 21120332014.

It is not an unprimeable number, because it can be changed into a prime (21120332003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12379178 + ... + 12380883.

It is an arithmetic number, because the mean of its divisors is an integer number (5286273237).

Almost surely, 2^21120332033 is an apocalyptic number.

It is an amenable number.

21120332033 is a deficient number, since it is larger than the sum of its proper divisors (24760915).

21120332033 is an equidigital number, since it uses as much as digits as its factorization.

21120332033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24760914.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21120332033 its reverse (33023302112), we get a palindrome (54143634145).

The spelling of 21120332033 in words is "twenty-one billion, one hundred twenty million, three hundred thirty-two thousand, thirty-three".