20011000001 has 2 divisors, whose sum is σ = 20011000002. Its totient is φ = 20011000000.

The previous prime is 20010999997. The next prime is 20011000003. The reversal of 20011000001 is 10000011002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19092606976 + 918393025 = 138176^2 + 30305^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011000001 - 2² = 20010999997 is a prime.

It is a Sophie Germain prime.

Together with 20011000003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20011000003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005500000 + 10005500001.

It is an arithmetic number, because the mean of its divisors is an integer number (10005500001).

Almost surely, 2^20011000001 is an apocalyptic number.

It is an amenable number.

20011000001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011000001 is an equidigital number, since it uses as much as digits as its factorization.

20011000001 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.

Adding to 20011000001 its reverse (10000011002), we get a palindrome (30011011003).

The spelling of 20011000001 in words is "twenty billion, eleven million, one", and thus it is an aban number and an uban number.