21230133303 has 16 divisors (see below), whose sum is σ = 29986478720. Its totient is φ = 13323095136.

The previous prime is 21230133299. The next prime is 21230133317. The reversal of 21230133303 is 30333103212.

It is not a de Polignac number, because 21230133303 - 2² = 21230133299 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21230133303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230133343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177225 + ... + 1195122.

It is an arithmetic number, because the mean of its divisors is an integer number (1874154920).

Almost surely, 2^21230133303 is an apocalyptic number.

21230133303 is a deficient number, since it is larger than the sum of its proper divisors (8756345417).

21230133303 is a wasteful number, since it uses less digits than its factorization.

21230133303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372526.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21230133303 its reverse (30333103212), we get a palindrome (51563236515).

The spelling of 21230133303 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-three thousand, three hundred three".