2001100111212 has 12 divisors (see below), whose sum is σ = 4669233592856. Its totient is φ = 667033370400.

The previous prime is 2001100111187. The next prime is 2001100111247. The reversal of 2001100111212 is 2121110011002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 166758342601 = 2001100111212 / (2 + 0 + 0 + 1 + 1 + 0 + 0 + 1 + 1 + 1 + 2 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83379171289 + ... + 83379171312.

Almost surely, 2^{2001100111212} is an apocalyptic number.

It is an amenable number.

2001100111212 is an abundant number, since it is smaller than the sum of its proper divisors (2668133481644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001100111212 is a wasteful number, since it uses less digits than its factorization.

2001100111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166758342608 (or 166758342606 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2001100111212 its reverse (2121110011002), we get a palindrome (4122210122214).

The spelling of 2001100111212 in words is "two trillion, one billion, one hundred million, one hundred eleven thousand, two hundred twelve".