2100011221 has 32 divisors (see below), whose sum is σ = 2662806528. Its totient is φ = 1608647040.

The previous prime is 2100011219. The next prime is 2100011227. The reversal of 2100011221 is 1221100012.

It is not a de Polignac number, because 2100011221 - 2¹ = 2100011219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100011198 and 2100011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100011227) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3074346 + ... + 3075028.

It is an arithmetic number, because the mean of its divisors is an integer number (83212704).

Almost surely, 2^2100011221 is an apocalyptic number.

It is an amenable number.

2100011221 is a deficient number, since it is larger than the sum of its proper divisors (562795307).

2100011221 is a wasteful number, since it uses less digits than its factorization.

2100011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321.

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

The square root of 2100011221 is about 45825.8793805422. The cubic root of 2100011221 is about 1280.5814458372.

Adding to 2100011221 its reverse (1221100012), we get a palindrome (3321111233).

The spelling of 2100011221 in words is "two billion, one hundred million, eleven thousand, two hundred twenty-one".