100222221181 has 2 divisors, whose sum is σ = 100222221182. Its totient is φ = 100222221180.

The previous prime is 100222221173. The next prime is 100222221241. The reversal of 100222221181 is 181122222001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82257108025 + 17965113156 = 286805^2 + 134034^2 .

It is a cyclic number.

It is not a de Polignac number, because 100222221181 - 2³ = 100222221173 is a prime.

It is a super-2 number, since 2×100222221181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100222227181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50111110590 + 50111110591.

It is an arithmetic number, because the mean of its divisors is an integer number (50111110591).

Almost surely, 2^100222221181 is an apocalyptic number.

It is an amenable number.

100222221181 is a deficient number, since it is larger than the sum of its proper divisors (1).

100222221181 is an equidigital number, since it uses as much as digits as its factorization.

100222221181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 100222221181 its reverse (181122222001), we get a palindrome (281344443182).

The spelling of 100222221181 in words is "one hundred billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred eighty-one".