100222004444581 has 2 divisors, whose sum is σ = 100222004444582. Its totient is φ = 100222004444580.

The previous prime is 100222004444521. The next prime is 100222004444621. The reversal of 100222004444581 is 185444400222001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65211600636900 + 35010403807681 = 8075370^2 + 5916959^2 .

It is a cyclic number.

It is not a de Polignac number, because 100222004444581 - 2⁹ = 100222004444069 is a prime.

It is a super-2 number, since 2×100222004444581² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100222004444581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100222004444521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50111002222290 + 50111002222291.

It is an arithmetic number, because the mean of its divisors is an integer number (50111002222291).

Almost surely, 2^{100222004444581} is an apocalyptic number.

It is an amenable number.

100222004444581 is a deficient number, since it is larger than the sum of its proper divisors (1).

100222004444581 is an equidigital number, since it uses as much as digits as its factorization.

100222004444581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81920, while the sum is 37.

Adding to 100222004444581 its reverse (185444400222001), we get a palindrome (285666404666582).

The spelling of 100222004444581 in words is "one hundred trillion, two hundred twenty-two billion, four million, four hundred forty-four thousand, five hundred eighty-one".