22112011220221 has 4 divisors (see below), whose sum is σ = 23812935160252. Its totient is φ = 20411087280192.

The previous prime is 22112011220087. The next prime is 22112011220291. The reversal of 22112011220221 is 12202211021122.

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 8763145188121 + 13348866032100 = 2960261^2 + 3653610^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112011220221 - 2¹¹ = 22112011218173 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 (22112011220291) 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, 850461969996 + ... + 850461970021.

It is an arithmetic number, because the mean of its divisors is an integer number (5953233790063).

Almost surely, 2^{22112011220221} is an apocalyptic number.

It is an amenable number.

22112011220221 is a deficient number, since it is larger than the sum of its proper divisors (1700923940031).

22112011220221 is a wasteful number, since it uses less digits than its factorization.

22112011220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700923940030.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22112011220221 its reverse (12202211021122), we get a palindrome (34314222241343).

The spelling of 22112011220221 in words is "twenty-two trillion, one hundred twelve billion, eleven million, two hundred twenty thousand, two hundred twenty-one".