21202102203 has 8 divisors (see below), whose sum is σ = 28340678928. Its totient is φ = 14099130144.

The previous prime is 21202102189. The next prime is 21202102219. The reversal of 21202102203 is 30220120212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21202102203 - 2³³ = 12612167611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202102253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8899776 + ... + 8902157.

It is an arithmetic number, because the mean of its divisors is an integer number (3542584866).

Almost surely, 2^21202102203 is an apocalyptic number.

21202102203 is a deficient number, since it is larger than the sum of its proper divisors (7138576725).

21202102203 is a wasteful number, since it uses less digits than its factorization.

21202102203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17802333.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21202102203 its reverse (30220120212), we get a palindrome (51422222415).

The spelling of 21202102203 in words is "twenty-one billion, two hundred two million, one hundred two thousand, two hundred three".