21113333203 has 4 divisors (see below), whose sum is σ = 21322376208. Its totient is φ = 20904290200.

The previous prime is 21113333179. The next prime is 21113333221. The reversal of 21113333203 is 30233331112.

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 21113333203 - 2¹³ = 21113325011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113333233) 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, 104521351 + ... + 104521552.

It is an arithmetic number, because the mean of its divisors is an integer number (5330594052).

Almost surely, 2^21113333203 is an apocalyptic number.

21113333203 is a deficient number, since it is larger than the sum of its proper divisors (209043005).

21113333203 is a wasteful number, since it uses less digits than its factorization.

21113333203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209043004.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21113333203 its reverse (30233331112), we get a palindrome (51346664315).

The spelling of 21113333203 in words is "twenty-one billion, one hundred thirteen million, three hundred thirty-three thousand, two hundred three".