2001222020100 has 72 divisors (see below), whose sum is σ = 5811568674688. Its totient is φ = 531689961600.

The previous prime is 2001222020071. The next prime is 2001222020131. The reversal of 2001222020100 is 10202221002.

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

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, 12226339 + ... + 12388938.

Almost surely, 2^{2001222020100} is an apocalyptic number.

2001222020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001222020100 is an abundant number, since it is smaller than the sum of its proper divisors (3810346654588).

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

2001222020100 is a wasteful number, since it uses less digits than its factorization.

2001222020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24615565 (or 24615558 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 2001222020100 its reverse (10202221002), we get a palindrome (2011424241102).

It can be divided in two parts, 200122 and 2020100, that added together give a palindrome (2220222).

The spelling of 2001222020100 in words is "two trillion, one billion, two hundred twenty-two million, twenty thousand, one hundred".