100221322644647 has 2 divisors, whose sum is σ = 100221322644648. Its totient is φ = 100221322644646.

The previous prime is 100221322644577. The next prime is 100221322644691. The reversal of 100221322644647 is 746446223122001.

It is an a-pointer prime, because the next prime (100221322644691) can be obtained adding 100221322644647 to its sum of digits (44).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100221322644647 - 2²² = 100221318450343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100221322644598 and 100221322644607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100221322641647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110661322323 + 50110661322324.

It is an arithmetic number, because the mean of its divisors is an integer number (50110661322324).

Almost surely, 2^{100221322644647} is an apocalyptic number.

100221322644647 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221322644647 is an equidigital number, since it uses as much as digits as its factorization.

100221322644647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 44.

Adding to 100221322644647 its reverse (746446223122001), we get a palindrome (846667545766648).

The spelling of 100221322644647 in words is "one hundred trillion, two hundred twenty-one billion, three hundred twenty-two million, six hundred forty-four thousand, six hundred forty-seven".