21223130333203 has 4 divisors (see below), whose sum is σ = 21223312112920. Its totient is φ = 21222948553488.

The previous prime is 21223130333183. The next prime is 21223130333233. The reversal of 21223130333203 is 30233303132212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223130333203 is a prime.

It is a super-2 number, since 2×21223130333203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223130333233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90714618 + ... + 90948271.

It is an arithmetic number, because the mean of its divisors is an integer number (5305828028230).

Almost surely, 2^{21223130333203} is an apocalyptic number.

21223130333203 is a deficient number, since it is larger than the sum of its proper divisors (181779717).

21223130333203 is a wasteful number, since it uses less digits than its factorization.

21223130333203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181779716.

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 21223130333203 its reverse (30233303132212), we get a palindrome (51456433465415).

The spelling of 21223130333203 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred thirty million, three hundred thirty-three thousand, two hundred three".