22211021122221 has 4 divisors (see below), whose sum is σ = 29614694829632. Its totient is φ = 14807347414812.

The previous prime is 22211021122201. The next prime is 22211021122231. The reversal of 22211021122221 is 12222112011222.

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 not a de Polignac number, because 22211021122221 - 2¹⁰ = 22211021121197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211021122201) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3701836853701 + ... + 3701836853706.

It is an arithmetic number, because the mean of its divisors is an integer number (7403673707408).

Almost surely, 2^{22211021122221} is an apocalyptic number.

It is an amenable number.

22211021122221 is a deficient number, since it is larger than the sum of its proper divisors (7403673707411).

22211021122221 is an equidigital number, since it uses as much as digits as its factorization.

22211021122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403673707410.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22211021122221 its reverse (12222112011222), we get a palindrome (34433133133443).

The spelling of 22211021122221 in words is "twenty-two trillion, two hundred eleven billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".