100206121 has 2 divisors, whose sum is σ = 100206122. Its totient is φ = 100206120.

The previous prime is 100206097. The next prime is 100206137. The reversal of 100206121 is 121602001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85766121 + 14440000 = 9261^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 100206121 - 2⁵ = 100206089 is a prime.

It is not a weakly prime, because it can be changed into another prime (100206191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50103060 + 50103061.

It is an arithmetic number, because the mean of its divisors is an integer number (50103061).

Almost surely, 2^100206121 is an apocalyptic number.

It is an amenable number.

100206121 is a deficient number, since it is larger than the sum of its proper divisors (1).

100206121 is an equidigital number, since it uses as much as digits as its factorization.

100206121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 100206121 is about 10010.3007447329. The cubic root of 100206121 is about 464.4775741426.

Adding to 100206121 its reverse (121602001), we get a palindrome (221808122).

The spelling of 100206121 in words is "one hundred million, two hundred six thousand, one hundred twenty-one".