2121211215 has 24 divisors (see below), whose sum is σ = 3678704640. Its totient is φ = 1130716224.

The previous prime is 2121211207. The next prime is 2121211237. The reversal of 2121211215 is 5121121212.

It is not a de Polignac number, because 2121211215 - 2³ = 2121211207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81714 + ... + 104496.

It is an arithmetic number, because the mean of its divisors is an integer number (153279360).

Almost surely, 2^2121211215 is an apocalyptic number.

2121211215 is a deficient number, since it is larger than the sum of its proper divisors (1557493425).

2121211215 is a wasteful number, since it uses less digits than its factorization.

2121211215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24863 (or 24860 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 2121211215 is about 46056.6088091601. The cubic root of 2121211215 is about 1284.8762597416.

Adding to 2121211215 its reverse (5121121212), we get a palindrome (7242332427).

The spelling of 2121211215 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred fifteen".