20011000001001 has 32 divisors (see below), whose sum is σ = 26861612532480. Its totient is φ = 13250684530944.

The previous prime is 20011000000993. The next prime is 20011000001009. The reversal of 20011000001001 is 10010000011002.

It is an interprime number because it is at equal distance from previous prime (20011000000993) and next prime (20011000001009).

It is not a de Polignac number, because 20011000001001 - 2³ = 20011000000993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011000001009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3203294460 + ... + 3203300706.

It is an arithmetic number, because the mean of its divisors is an integer number (839425391640).

Almost surely, 2^{20011000001001} is an apocalyptic number.

It is an amenable number.

20011000001001 is a deficient number, since it is larger than the sum of its proper divisors (6850612531479).

20011000001001 is a wasteful number, since it uses less digits than its factorization.

20011000001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11425.

The product of its (nonzero) digits is 2, while the sum is 6.

Adding to 20011000001001 its reverse (10010000011002), we get a palindrome (30021000012003).

The spelling of 20011000001001 in words is "twenty trillion, eleven billion, one thousand, one".