2001021221112 has 32 divisors (see below), whose sum is σ = 5002918414080. Its totient is φ = 666958358880.

The previous prime is 2001021221099. The next prime is 2001021221141. The reversal of 2001021221112 is 2111221201002.

It is a junction number, because it is equal to n+sod(n) for n = 2001021221091 and 2001021221100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2708464 + ... + 3367167.

It is an arithmetic number, because the mean of its divisors is an integer number (156341200440).

Almost surely, 2^{2001021221112} is an apocalyptic number.

It is an amenable number.

2001021221112 is an abundant number, since it is smaller than the sum of its proper divisors (3001897192968).

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

2001021221112 is a wasteful number, since it uses less digits than its factorization.

2001021221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089363 (or 6089359 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2001021221112 its reverse (2111221201002), we get a palindrome (4112242422114).

The spelling of 2001021221112 in words is "two trillion, one billion, twenty-one million, two hundred twenty-one thousand, one hundred twelve".