2001020022001 has 32 divisors (see below), whose sum is σ = 2687040921600. Its totient is φ = 1439104034880.

The previous prime is 2001020021999. The next prime is 2001020022041. The reversal of 2001020022001 is 1002200201002.

It is a cyclic number.

It is not a de Polignac number, because 2001020022001 - 2¹ = 2001020021999 is a prime.

It is a super-2 number, since 2×2001020022001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001020022041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7637940 + ... + 7895578.

It is an arithmetic number, because the mean of its divisors is an integer number (83970028800).

Almost surely, 2^{2001020022001} is an apocalyptic number.

It is an amenable number.

2001020022001 is a deficient number, since it is larger than the sum of its proper divisors (686020899599).

2001020022001 is a wasteful number, since it uses less digits than its factorization.

2001020022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265429.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2001020022001 its reverse (1002200201002), we get a palindrome (3003220223003).

The spelling of 2001020022001 in words is "two trillion, one billion, twenty million, twenty-two thousand, one".