2001001212001 has 16 divisors (see below), whose sum is σ = 2233745141760. Its totient is φ = 1776732365520.

The previous prime is 2001001211981. The next prime is 2001001212061. The reversal of 2001001212001 is 1002121001002.

It is a cyclic number.

It is not a de Polignac number, because 2001001212001 - 2¹⁹ = 2001000687713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001001212061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26677116 + ... + 26752018.

It is an arithmetic number, because the mean of its divisors is an integer number (139609071360).

Almost surely, 2^{2001001212001} is an apocalyptic number.

It is an amenable number.

2001001212001 is a deficient number, since it is larger than the sum of its proper divisors (232743929759).

2001001212001 is a wasteful number, since it uses less digits than its factorization.

2001001212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131436.

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

Adding to 2001001212001 its reverse (1002121001002), we get a palindrome (3003122213003).

The spelling of 2001001212001 in words is "two trillion, one billion, one million, two hundred twelve thousand, one".