100210001 has 2 divisors, whose sum is σ = 100210002. Its totient is φ = 100210000.

The previous prime is 100209997. The next prime is 100210043. The reversal of 100210001 is 100012001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93702400 + 6507601 = 9680^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 100210001 - 2² = 100209997 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100230001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50105000 + 50105001.

It is an arithmetic number, because the mean of its divisors is an integer number (50105001).

Almost surely, 2^100210001 is an apocalyptic number.

It is an amenable number.

100210001 is a deficient number, since it is larger than the sum of its proper divisors (1).

100210001 is an equidigital number, since it uses as much as digits as its factorization.

100210001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 100210001 is about 10010.4945432281. The cubic root of 100210001 is about 464.4835689518.

Adding to 100210001 its reverse (100012001), we get a palindrome (200222002).

The spelling of 100210001 in words is "one hundred million, two hundred ten thousand, one".