2001022001006 has 24 divisors (see below), whose sum is σ = 3491750840760. Its totient is φ = 857538701712.

The previous prime is 2001022000997. The next prime is 2001022001009. The reversal of 2001022001006 is 6001002201002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001022001009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1544285 + ... + 2527223.

It is an arithmetic number, because the mean of its divisors is an integer number (145489618365).

Almost surely, 2^{2001022001006} is an apocalyptic number.

2001022001006 is a deficient number, since it is larger than the sum of its proper divisors (1490728839754).

2001022001006 is a wasteful number, since it uses less digits than its factorization.

2001022001006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003728 (or 1003721 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 2001022001006 its reverse (6001002201002), we get a palindrome (8002024202008).

The spelling of 2001022001006 in words is "two trillion, one billion, twenty-two million, one thousand, six".