22201210181 has 2 divisors, whose sum is σ = 22201210182. Its totient is φ = 22201210180.

The previous prime is 22201210177. The next prime is 22201210211. The reversal of 22201210181 is 18101210222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12395259556 + 9805950625 = 111334^2 + 99025^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201210181 - 2² = 22201210177 is a prime.

It is a super-2 number, since 2×22201210181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201210151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100605090 + 11100605091.

It is an arithmetic number, because the mean of its divisors is an integer number (11100605091).

Almost surely, 2^22201210181 is an apocalyptic number.

It is an amenable number.

22201210181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201210181 is an equidigital number, since it uses as much as digits as its factorization.

22201210181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 22201210181 in words is "twenty-two billion, two hundred one million, two hundred ten thousand, one hundred eighty-one".