22021120221181 has 2 divisors, whose sum is σ = 22021120221182. Its totient is φ = 22021120221180.

The previous prime is 22021120221131. The next prime is 22021120221229. The reversal of 22021120221181 is 18112202112022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16441646328900 + 5579473892281 = 4054830^2 + 2362091^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021120221181 - 2¹⁵ = 22021120188413 is a prime.

It is a super-2 number, since 2×22021120221181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021120221131) 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 as a sum of consecutive naturals, namely, 11010560110590 + 11010560110591.

It is an arithmetic number, because the mean of its divisors is an integer number (11010560110591).

Almost surely, 2^{22021120221181} is an apocalyptic number.

It is an amenable number.

22021120221181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021120221181 is an equidigital number, since it uses as much as digits as its factorization.

22021120221181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 25.

The spelling of 22021120221181 in words is "twenty-two trillion, twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred eighty-one".