22221120021181 has 2 divisors, whose sum is σ = 22221120021182. Its totient is φ = 22221120021180.

The previous prime is 22221120021103. The next prime is 22221120021257. The reversal of 22221120021181 is 18112002112222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17184888357156 + 5036231664025 = 4145466^2 + 2244155^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221120021181 - 2¹⁵ = 22221119988413 is a prime.

It is a super-2 number, since 2×22221120021181² (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 (22221120021781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110560010590 + 11110560010591.

It is an arithmetic number, because the mean of its divisors is an integer number (11110560010591).

Almost surely, 2^{22221120021181} is an apocalyptic number.

It is an amenable number.

22221120021181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221120021181 is an equidigital number, since it uses as much as digits as its factorization.

22221120021181 is an evil number, because the sum of its binary digits is even.

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

The spelling of 22221120021181 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred eighty-one".