20001011002001 has 8 divisors (see below), whose sum is σ = 21262148227200. Its totient is φ = 18760719020400.

The previous prime is 20001011001989. The next prime is 20001011002009. The reversal of 20001011002001 is 10020011010002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001011002001 - 2³⁸ = 19726133095057 is a prime.

It is a super-2 number, since 2×20001011002001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20001011002001.

It is not an unprimeable number, because it can be changed into a prime (20001011002009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5211308921 + ... + 5211312758.

It is an arithmetic number, because the mean of its divisors is an integer number (2657768528400).

Almost surely, 2^{20001011002001} is an apocalyptic number.

It is an amenable number.

20001011002001 is a deficient number, since it is larger than the sum of its proper divisors (1261137225199).

20001011002001 is a wasteful number, since it uses less digits than its factorization.

20001011002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10422621799.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20001011002001 its reverse (10020011010002), we get a palindrome (30021022012003).

The spelling of 20001011002001 in words is "twenty trillion, one billion, eleven million, two thousand, one".