100221865784273 has 2 divisors, whose sum is σ = 100221865784274. Its totient is φ = 100221865784272.

The previous prime is 100221865784231. The next prime is 100221865784357. The reversal of 100221865784273 is 372487568122001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99246883326529 + 974982457744 = 9962273^2 + 987412^2 .

It is a cyclic number.

It is not a de Polignac number, because 100221865784273 - 2²⁰ = 100221864735697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (100221865781273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110932892136 + 50110932892137.

It is an arithmetic number, because the mean of its divisors is an integer number (50110932892137).

Almost surely, 2^{100221865784273} is an apocalyptic number.

It is an amenable number.

100221865784273 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221865784273 is an equidigital number, since it uses as much as digits as its factorization.

100221865784273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 100221865784273 in words is "one hundred trillion, two hundred twenty-one billion, eight hundred sixty-five million, seven hundred eighty-four thousand, two hundred seventy-three".