2001022221100 has 72 divisors (see below), whose sum is σ = 5036602914560. Its totient is φ = 675824973120.

The previous prime is 2001022221089. The next prime is 2001022221101. The reversal of 2001022221100 is 11222201002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2001022221101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21285960 + ... + 21379759.

Almost surely, 2^{2001022221100} is an apocalyptic number.

2001022221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001022221100 is an abundant number, since it is smaller than the sum of its proper divisors (3035580693460).

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

2001022221100 is a wasteful number, since it uses less digits than its factorization.

2001022221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42665807 (or 42665800 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001022221100 its reverse (11222201002), we get a palindrome (2012244422102).

The spelling of 2001022221100 in words is "two trillion, one billion, twenty-two million, two hundred twenty-one thousand, one hundred".