2001020012011 has 4 divisors (see below), whose sum is σ = 2003649474024. Its totient is φ = 1998390550000.

The previous prime is 2001020011981. The next prime is 2001020012099. The reversal of 2001020012011 is 1102100201002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001020012011 - 2¹³ = 2001020003819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001020412011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314729865 + ... + 1314731386.

It is an arithmetic number, because the mean of its divisors is an integer number (500912368506).

Almost surely, 2^{2001020012011} is an apocalyptic number.

2001020012011 is a deficient number, since it is larger than the sum of its proper divisors (2629462013).

2001020012011 is an equidigital number, since it uses as much as digits as its factorization.

2001020012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629462012.

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

Adding to 2001020012011 its reverse (1102100201002), we get a palindrome (3103120213013).

The spelling of 2001020012011 in words is "two trillion, one billion, twenty million, twelve thousand, eleven".