21050321203 has 8 divisors (see below), whose sum is σ = 21188280320. Its totient is φ = 20912411520.

The previous prime is 21050321191. The next prime is 21050321209. The reversal of 21050321203 is 30212305012.

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

It is a cyclic number.

It is not a de Polignac number, because 21050321203 - 2⁹ = 21050320691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21050321209) 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, 1277803 + ... + 1294171.

It is an arithmetic number, because the mean of its divisors is an integer number (2648535040).

Almost surely, 2^21050321203 is an apocalyptic number.

21050321203 is a deficient number, since it is larger than the sum of its proper divisors (137959117).

21050321203 is a wasteful number, since it uses less digits than its factorization.

21050321203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24717.

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 21050321203 its reverse (30212305012), we get a palindrome (51262626215).

The spelling of 21050321203 in words is "twenty-one billion, fifty million, three hundred twenty-one thousand, two hundred three".