2001121313211 has 16 divisors (see below), whose sum is σ = 2977684195200. Its totient is φ = 1328203863144.

The previous prime is 2001121313143. The next prime is 2001121313227. The reversal of 2001121313211 is 1123131211002.

2001121313211 is a `hidden beast` number, since 20 + 0 + 1 + 121 + 313 + 211 = 666.

It is not a de Polignac number, because 2001121313211 - 2¹⁰ = 2001121312187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001121313281) 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, 163244101 + ... + 163256358.

It is an arithmetic number, because the mean of its divisors is an integer number (186105262200).

Almost surely, 2^{2001121313211} is an apocalyptic number.

2001121313211 is a deficient number, since it is larger than the sum of its proper divisors (976562881989).

2001121313211 is a wasteful number, since it uses less digits than its factorization.

2001121313211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326500695 (or 326500689 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2001121313211 its reverse (1123131211002), we get a palindrome (3124252524213).

The spelling of 2001121313211 in words is "two trillion, one billion, one hundred twenty-one million, three hundred thirteen thousand, two hundred eleven".