2011221100 has 72 divisors (see below), whose sum is σ = 5148781568. Its totient is φ = 667310400.

The previous prime is 2011221073. The next prime is 2011221119. The reversal of 2011221100 is 11221102.

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 (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24642 + ... + 68041.

Almost surely, 2^2011221100 is an apocalyptic number.

2011221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011221100 is an abundant number, since it is smaller than the sum of its proper divisors (3137560468).

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

2011221100 is a wasteful number, since it uses less digits than its factorization.

2011221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92735 (or 92728 counting only the distinct ones).

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

The square root of 2011221100 is about 44846.6397849382. The cubic root of 2011221100 is about 1262.2729402462.

Adding to 2011221100 its reverse (11221102), we get a palindrome (2022442202).

The spelling of 2011221100 in words is "two billion, eleven million, two hundred twenty-one thousand, one hundred".