21223133101 has 4 divisors (see below), whose sum is σ = 21223425600. Its totient is φ = 21222840604.

The previous prime is 21223133051. The next prime is 21223133143. The reversal of 21223133101 is 10133132212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21223133101 - 2¹¹ = 21223131053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223133401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53820 + ... + 212938.

It is an arithmetic number, because the mean of its divisors is an integer number (5305856400).

Almost surely, 2^21223133101 is an apocalyptic number.

It is an amenable number.

21223133101 is a deficient number, since it is larger than the sum of its proper divisors (292499).

21223133101 is a wasteful number, since it uses less digits than its factorization.

21223133101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292498.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21223133101 its reverse (10133132212), we get a palindrome (31356265313).

The spelling of 21223133101 in words is "twenty-one billion, two hundred twenty-three million, one hundred thirty-three thousand, one hundred one".