2001211120001 has 4 divisors (see below), whose sum is σ = 2010695533104. Its totient is φ = 1991726706900.

The previous prime is 2001211119977. The next prime is 2001211120003. The reversal of 2001211120001 is 1000211121002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001211120001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001211120003) 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, 4742206235 + ... + 4742206656.

It is an arithmetic number, because the mean of its divisors is an integer number (502673883276).

Almost surely, 2^{2001211120001} is an apocalyptic number.

It is an amenable number.

2001211120001 is a deficient number, since it is larger than the sum of its proper divisors (9484413103).

2001211120001 is an equidigital number, since it uses as much as digits as its factorization.

2001211120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9484413102.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2001211120001 its reverse (1000211121002), we get a palindrome (3001422241003).

It can be divided in two parts, 2001211 and 120001, that added together give a palindrome (2121212).

The spelling of 2001211120001 in words is "two trillion, one billion, two hundred eleven million, one hundred twenty thousand, one".