2001121002001 has 8 divisors (see below), whose sum is σ = 2190755022624. Its totient is φ = 1812772636320.

The previous prime is 2001121001987. The next prime is 2001121002047. The reversal of 2001121002001 is 1002001211002.

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 2001121002001 - 2³⁹ = 1451365188113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001121002901) 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, 321410476 + ... + 321416701.

It is an arithmetic number, because the mean of its divisors is an integer number (273844377828).

Almost surely, 2^{2001121002001} is an apocalyptic number.

It is an amenable number.

2001121002001 is a deficient number, since it is larger than the sum of its proper divisors (189634020623).

2001121002001 is a wasteful number, since it uses less digits than its factorization.

2001121002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642827471.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2001121002001 its reverse (1002001211002), we get a palindrome (3003122213003).

It can be divided in two parts, 20011 and 21002001, that added together give a palindrome (21022012).

The spelling of 2001121002001 in words is "two trillion, one billion, one hundred twenty-one million, two thousand, one".