20010100001 has 2 divisors, whose sum is σ = 20010100002. Its totient is φ = 20010100000.

The previous prime is 20010099997. The next prime is 20010100013. The reversal of 20010100001 is 10000101002.

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., 19425669376 + 584430625 = 139376^2 + 24175^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010100001 - 2² = 20010099997 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010100051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005050000 + 10005050001.

It is an arithmetic number, because the mean of its divisors is an integer number (10005050001).

Almost surely, 2^20010100001 is an apocalyptic number.

It is an amenable number.

20010100001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010100001 is an equidigital number, since it uses as much as digits as its factorization.

20010100001 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20010100001 its reverse (10000101002), we get a palindrome (30010201003).

The spelling of 20010100001 in words is "twenty billion, ten million, one hundred thousand, one".