21100330033 has 4 divisors (see below), whose sum is σ = 21415260400. Its totient is φ = 20785399668.

The previous prime is 21100330003. The next prime is 21100330039. The reversal of 21100330033 is 33003300112.

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 21100330033 - 2⁵ = 21100330001 is a prime.

It is a Duffinian number.

21100330033 is a modest number, since divided by 330033 gives 211 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 21100329989 and 21100330016.

It is not an unprimeable number, because it can be changed into a prime (21100330039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157465083 + ... + 157465216.

It is an arithmetic number, because the mean of its divisors is an integer number (5353815100).

Almost surely, 2^21100330033 is an apocalyptic number.

It is an amenable number.

21100330033 is a deficient number, since it is larger than the sum of its proper divisors (314930367).

21100330033 is an equidigital number, since it uses as much as digits as its factorization.

21100330033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314930366.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21100330033 its reverse (33003300112), we get a palindrome (54103630145).

The spelling of 21100330033 in words is "twenty-one billion, one hundred million, three hundred thirty thousand, thirty-three".