100020211997 has 2 divisors, whose sum is σ = 100020211998. Its totient is φ = 100020211996.

The previous prime is 100020211979. The next prime is 100020212003. The reversal of 100020211997 is 799112020001.

Together with previous prime (100020211979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99619771876 + 400440121 = 315626^2 + 20011^2 .

It is an emirp because it is prime and its reverse (799112020001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100020211997 - 2⁶ = 100020211933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100020211397) 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, 50010105998 + 50010105999.

It is an arithmetic number, because the mean of its divisors is an integer number (50010105999).

Almost surely, 2^100020211997 is an apocalyptic number.

It is an amenable number.

100020211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

100020211997 is an equidigital number, since it uses as much as digits as its factorization.

100020211997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 32.

Adding to 100020211997 its reverse (799112020001), we get a palindrome (899132231998).

The spelling of 100020211997 in words is "one hundred billion, twenty million, two hundred eleven thousand, nine hundred ninety-seven".