21202131203 has 4 divisors (see below), whose sum is σ = 23129597688. Its totient is φ = 19274664720.

The previous prime is 21202131199. The next prime is 21202131211. The reversal of 21202131203 is 30213120212.

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 21202131203 - 2² = 21202131199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202131283) 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, 963733226 + ... + 963733247.

It is an arithmetic number, because the mean of its divisors is an integer number (5782399422).

Almost surely, 2^21202131203 is an apocalyptic number.

21202131203 is a deficient number, since it is larger than the sum of its proper divisors (1927466485).

21202131203 is a wasteful number, since it uses less digits than its factorization.

21202131203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1927466484.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21202131203 its reverse (30213120212), we get a palindrome (51415251415).

The spelling of 21202131203 in words is "twenty-one billion, two hundred two million, one hundred thirty-one thousand, two hundred three".