2121021115 has 8 divisors (see below), whose sum is σ = 2614015440. Its totient is φ = 1650956832.

The previous prime is 2121021103. The next prime is 2121021121. The reversal of 2121021115 is 5111201212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121021115 - 2²⁹ = 1584150203 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5732305 + ... + 5732674.

It is an arithmetic number, because the mean of its divisors is an integer number (326751930).

Almost surely, 2^2121021115 is an apocalyptic number.

2121021115 is a deficient number, since it is larger than the sum of its proper divisors (492994325).

2121021115 is a wasteful number, since it uses less digits than its factorization.

2121021115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11465021.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 2121021115 is about 46054.5449982952. The cubic root of 2121021115 is about 1284.8378756536.

Adding to 2121021115 its reverse (5111201212), we get a palindrome (7232222327).

The spelling of 2121021115 in words is "two billion, one hundred twenty-one million, twenty-one thousand, one hundred fifteen".