21230133202 has 4 divisors (see below), whose sum is σ = 31845199806. Its totient is φ = 10615066600.

The previous prime is 21230133191. The next prime is 21230133229. The reversal of 21230133202 is 20233103212.

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

It can be written as a sum of positive squares in only one way, i.e., 16327472841 + 4902660361 = 127779^2 + 70019^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21230133202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5307533299 + ... + 5307533302.

Almost surely, 2^21230133202 is an apocalyptic number.

21230133202 is a deficient number, since it is larger than the sum of its proper divisors (10615066604).

21230133202 is a wasteful number, since it uses less digits than its factorization.

21230133202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10615066603.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21230133202 its reverse (20233103212), we get a palindrome (41463236414).

The spelling of 21230133202 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-three thousand, two hundred two".