201021100097 has 2 divisors, whose sum is σ = 201021100098. Its totient is φ = 201021100096.

The previous prime is 201021100061. The next prime is 201021100123. The reversal of 201021100097 is 790001120102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105957411121 + 95063688976 = 325511^2 + 308324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201021100097 is a prime.

It is not a weakly prime, because it can be changed into another prime (201021100057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510550048 + 100510550049.

It is an arithmetic number, because the mean of its divisors is an integer number (100510550049).

Almost surely, 2^201021100097 is an apocalyptic number.

It is an amenable number.

201021100097 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021100097 is an equidigital number, since it uses as much as digits as its factorization.

201021100097 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 201021100097 its reverse (790001120102), we get a palindrome (991022220199).

The spelling of 201021100097 in words is "two hundred one billion, twenty-one million, one hundred thousand, ninety-seven".