21222110221033 has 4 divisors (see below), whose sum is σ = 21249564439428. Its totient is φ = 21194656002640.

The previous prime is 21222110221027. The next prime is 21222110221057. The reversal of 21222110221033 is 33012201122212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11467650777664 + 9754459443369 = 3386392^2 + 3123213^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222110221033 - 2⁵ = 21222110221001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222110220995 and 21222110221013.

It is not an unprimeable number, because it can be changed into a prime (21222110221063) 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, 13727108038 + ... + 13727109583.

It is an arithmetic number, because the mean of its divisors is an integer number (5312391109857).

Almost surely, 2^{21222110221033} is an apocalyptic number.

It is an amenable number.

21222110221033 is a deficient number, since it is larger than the sum of its proper divisors (27454218395).

21222110221033 is an equidigital number, since it uses as much as digits as its factorization.

21222110221033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27454218394.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21222110221033 its reverse (33012201122212), we get a palindrome (54234311343245).

The spelling of 21222110221033 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, two hundred twenty-one thousand, thirty-three".