100221210197 has 2 divisors, whose sum is σ = 100221210198. Its totient is φ = 100221210196.

The previous prime is 100221210163. The next prime is 100221210227. The reversal of 100221210197 is 791012122001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64620690436 + 35600519761 = 254206^2 + 188681^2 .

It is a cyclic number.

It is not a de Polignac number, because 100221210197 - 2⁸ = 100221209941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100221210107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110605098 + 50110605099.

It is an arithmetic number, because the mean of its divisors is an integer number (50110605099).

Almost surely, 2^100221210197 is an apocalyptic number.

It is an amenable number.

100221210197 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221210197 is an equidigital number, since it uses as much as digits as its factorization.

100221210197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

Adding to 100221210197 its reverse (791012122001), we get a palindrome (891233332198).

The spelling of 100221210197 in words is "one hundred billion, two hundred twenty-one million, two hundred ten thousand, one hundred ninety-seven".