2221001001100 has 72 divisors (see below), whose sum is σ = 5510070770400. Its totient is φ = 761211179520.

The previous prime is 2221001001077. The next prime is 2221001001157. The reversal of 2221001001100 is 11001001222.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1372626 + ... + 2515174.

It is an arithmetic number, because the mean of its divisors is an integer number (76528760700).

Almost surely, 2^{2221001001100} is an apocalyptic number.

2221001001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221001001100 is an abundant number, since it is smaller than the sum of its proper divisors (3289069769300).

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

2221001001100 is a wasteful number, since it uses less digits than its factorization.

2221001001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145347 (or 1145340 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2221001001100 its reverse (11001001222), we get a palindrome (2232002002322).

The spelling of 2221001001100 in words is "two trillion, two hundred twenty-one billion, one million, one thousand, one hundred".