2001221110200 has 96 divisors (see below), whose sum is σ = 6680999732400. Its totient is φ = 492608271360.

The previous prime is 2001221110159. The next prime is 2001221110223. The reversal of 2001221110200 is 20111221002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128275605 + ... + 128291204.

Almost surely, 2^{2001221110200} is an apocalyptic number.

2001221110200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001221110200 is an abundant number, since it is smaller than the sum of its proper divisors (4679778622200).

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

2001221110200 is a wasteful number, since it uses less digits than its factorization.

2001221110200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256566841 (or 256566832 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001221110200 its reverse (20111221002), we get a palindrome (2021332331202).

The spelling of 2001221110200 in words is "two trillion, one billion, two hundred twenty-one million, one hundred ten thousand, two hundred".