21033332103 has 32 divisors (see below), whose sum is σ = 32600627712. Its totient is φ = 11813155200.

The previous prime is 21033332083. The next prime is 21033332107. The reversal of 21033332103 is 30123333012.

It is not a de Polignac number, because 21033332103 - 2⁶ = 21033332039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21033332103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033332107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1945573 + ... + 1956353.

It is an arithmetic number, because the mean of its divisors is an integer number (1018769616).

Almost surely, 2^21033332103 is an apocalyptic number.

21033332103 is a deficient number, since it is larger than the sum of its proper divisors (11567295609).

21033332103 is a wasteful number, since it uses less digits than its factorization.

21033332103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12375.

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

Adding to 21033332103 its reverse (30123333012), we get a palindrome (51156665115).

Subtracting 21033332103 from its reverse (30123333012), we obtain a palindrome (9090000909).

The spelling of 21033332103 in words is "twenty-one billion, thirty-three million, three hundred thirty-two thousand, one hundred three".