2121021116 has 24 divisors (see below), whose sum is σ = 4056909696. Its totient is φ = 965928960.

The previous prime is 2121021103. The next prime is 2121021121. The reversal of 2121021116 is 6111201212.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 2121021094 and 2121021103.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 500981 + ... + 505196.

It is an arithmetic number, because the mean of its divisors is an integer number (169037904).

Almost surely, 2^2121021116 is an apocalyptic number.

It is an amenable number.

2121021116 is a deficient number, since it is larger than the sum of its proper divisors (1935888580).

2121021116 is a wasteful number, since it uses less digits than its factorization.

2121021116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006229 (or 1006227 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 2121021116 is about 46054.5450091519. The cubic root of 2121021116 is about 1284.8378758555.

Adding to 2121021116 its reverse (6111201212), we get a palindrome (8232222328).

The spelling of 2121021116 in words is "two billion, one hundred twenty-one million, twenty-one thousand, one hundred sixteen".