2121115514 has 32 divisors (see below), whose sum is σ = 3659648256. Its totient is φ = 903208320.

The previous prime is 2121115501. The next prime is 2121115541. The reversal of 2121115514 is 4155111212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121115514.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2786894 + ... + 2787654.

It is an arithmetic number, because the mean of its divisors is an integer number (114364008).

Almost surely, 2^2121115514 is an apocalyptic number.

2121115514 is a deficient number, since it is larger than the sum of its proper divisors (1538532742).

2121115514 is a wasteful number, since it uses less digits than its factorization.

2121115514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790.

The product of its digits is 400, while the sum is 23.

The square root of 2121115514 is about 46055.5698477394. The cubic root of 2121115514 is about 1284.8569365374.

Adding to 2121115514 its reverse (4155111212), we get a palindrome (6276226726).

The spelling of 2121115514 in words is "two billion, one hundred twenty-one million, one hundred fifteen thousand, five hundred fourteen".