100020120197 has 2 divisors, whose sum is σ = 100020120198. Its totient is φ = 100020120196.

The previous prime is 100020120173. The next prime is 100020120199. The reversal of 100020120197 is 791021020001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73436122081 + 26583998116 = 270991^2 + 163046^2 .

It is an emirp because it is prime and its reverse (791021020001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100020120197 - 2²⁴ = 100003342981 is a prime.

Together with 100020120199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100020120199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010060098 + 50010060099.

It is an arithmetic number, because the mean of its divisors is an integer number (50010060099).

Almost surely, 2^100020120197 is an apocalyptic number.

It is an amenable number.

100020120197 is a deficient number, since it is larger than the sum of its proper divisors (1).

100020120197 is an equidigital number, since it uses as much as digits as its factorization.

100020120197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

Adding to 100020120197 its reverse (791021020001), we get a palindrome (891041140198).

The spelling of 100020120197 in words is "one hundred billion, twenty million, one hundred twenty thousand, one hundred ninety-seven".