100221322644577 has 2 divisors, whose sum is σ = 100221322644578. Its totient is φ = 100221322644576.

The previous prime is 100221322644551. The next prime is 100221322644647. The reversal of 100221322644577 is 775446223122001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59425458681681 + 40795863962896 = 7708791^2 + 6387164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221322644577 is a prime.

It is not a weakly prime, because it can be changed into another prime (100221322444577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110661322288 + 50110661322289.

It is an arithmetic number, because the mean of its divisors is an integer number (50110661322289).

Almost surely, 2^{100221322644577} is an apocalyptic number.

It is an amenable number.

100221322644577 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221322644577 is an equidigital number, since it uses as much as digits as its factorization.

100221322644577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 46.

Adding to 100221322644577 its reverse (775446223122001), we get a palindrome (875667545766578).

The spelling of 100221322644577 in words is "one hundred trillion, two hundred twenty-one billion, three hundred twenty-two million, six hundred forty-four thousand, five hundred seventy-seven".