221100021133 has 4 divisors (see below), whose sum is σ = 221940705888. Its totient is φ = 220259336380.

The previous prime is 221100021071. The next prime is 221100021137. The reversal of 221100021133 is 331120001122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221100021133 - 2¹³ = 221100012941 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 (221100021137) 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, 420341983 + ... + 420342508.

It is an arithmetic number, because the mean of its divisors is an integer number (55485176472).

Almost surely, 2^221100021133 is an apocalyptic number.

It is an amenable number.

221100021133 is a deficient number, since it is larger than the sum of its proper divisors (840684755).

221100021133 is an equidigital number, since it uses as much as digits as its factorization.

221100021133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840684754.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221100021133 its reverse (331120001122), we get a palindrome (552220022255).

The spelling of 221100021133 in words is "two hundred twenty-one billion, one hundred million, twenty-one thousand, one hundred thirty-three".