21113030203 has 8 divisors (see below), whose sum is σ = 21351798720. Its totient is φ = 20874844800.

The previous prime is 21113030177. The next prime is 21113030209. The reversal of 21113030203 is 30203031112.

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 21113030203 - 2¹³ = 21113022011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113030209) 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, 72750 + ... + 217987.

It is an arithmetic number, because the mean of its divisors is an integer number (2668974840).

Almost surely, 2^21113030203 is an apocalyptic number.

21113030203 is a deficient number, since it is larger than the sum of its proper divisors (238768517).

21113030203 is a wasteful number, since it uses less digits than its factorization.

21113030203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291557.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21113030203 its reverse (30203031112), we get a palindrome (51316061315).

Subtracting 21113030203 from its reverse (30203031112), we obtain a palindrome (9090000909).

The spelling of 21113030203 in words is "twenty-one billion, one hundred thirteen million, thirty thousand, two hundred three".