2001221100112 has 40 divisors (see below), whose sum is σ = 4272732367904. Its totient is φ = 902160491904.

The previous prime is 2001221100049. The next prime is 2001221100133. The reversal of 2001221100112 is 2110011221002.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 2001221100092 and 2001221100101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111866118 + ... + 111884005.

Almost surely, 2^{2001221100112} is an apocalyptic number.

It is an amenable number.

2001221100112 is an abundant number, since it is smaller than the sum of its proper divisors (2271511267792).

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

2001221100112 is a wasteful number, since it uses less digits than its factorization.

2001221100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223750187 (or 223750181 counting only the distinct ones).

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

Adding to 2001221100112 its reverse (2110011221002), we get a palindrome (4111232321114).

The spelling of 2001221100112 in words is "two trillion, one billion, two hundred twenty-one million, one hundred thousand, one hundred twelve".