100222110581 has 2 divisors, whose sum is σ = 100222110582. Its totient is φ = 100222110580.

The previous prime is 100222110577. The next prime is 100222110589. The reversal of 100222110581 is 185011222001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88407507556 + 11814603025 = 297334^2 + 108695^2 .

It is a cyclic number.

It is not a de Polignac number, because 100222110581 - 2² = 100222110577 is a prime.

It is a super-2 number, since 2×100222110581² (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 (100222110589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50111055290 + 50111055291.

It is an arithmetic number, because the mean of its divisors is an integer number (50111055291).

Almost surely, 2^100222110581 is an apocalyptic number.

It is an amenable number.

100222110581 is a deficient number, since it is larger than the sum of its proper divisors (1).

100222110581 is an equidigital number, since it uses as much as digits as its factorization.

100222110581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 23.

Adding to 100222110581 its reverse (185011222001), we get a palindrome (285233332582).

The spelling of 100222110581 in words is "one hundred billion, two hundred twenty-two million, one hundred ten thousand, five hundred eighty-one".