2001001212211 has 4 divisors (see below), whose sum is σ = 2001008273400. Its totient is φ = 2000994151024.

The previous prime is 2001001212181. The next prime is 2001001212241. The reversal of 2001001212211 is 1122121001002.

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

It is an interprime number because it is at equal distance from previous prime (2001001212181) and next prime (2001001212241).

It is a cyclic number.

It is not a de Polignac number, because 2001001212211 - 2⁵ = 2001001212179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001001212191 and 2001001212200.

It is not an unprimeable number, because it can be changed into a prime (2001001212241) 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, 3086941 + ... + 3678478.

It is an arithmetic number, because the mean of its divisors is an integer number (500252068350).

Almost surely, 2^{2001001212211} is an apocalyptic number.

2001001212211 is a deficient number, since it is larger than the sum of its proper divisors (7061189).

2001001212211 is an equidigital number, since it uses as much as digits as its factorization.

2001001212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7061188.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001001212211 its reverse (1122121001002), we get a palindrome (3123122213213).

The spelling of 2001001212211 in words is "two trillion, one billion, one million, two hundred twelve thousand, two hundred eleven".