21332100203 has 4 divisors (see below), whose sum is σ = 21333482640. Its totient is φ = 21330717768.

The previous prime is 21332100199. The next prime is 21332100241. The reversal of 21332100203 is 30200123312.

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

It is a cyclic number.

It is not a de Polignac number, because 21332100203 - 2² = 21332100199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332100263) 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, 667808 + ... + 699021.

It is an arithmetic number, because the mean of its divisors is an integer number (5333370660).

Almost surely, 2^21332100203 is an apocalyptic number.

21332100203 is a deficient number, since it is larger than the sum of its proper divisors (1382437).

21332100203 is a wasteful number, since it uses less digits than its factorization.

21332100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382436.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21332100203 its reverse (30200123312), we get a palindrome (51532223515).

The spelling of 21332100203 in words is "twenty-one billion, three hundred thirty-two million, one hundred thousand, two hundred three".