2121113155 has 16 divisors (see below), whose sum is σ = 3002793984. Its totient is φ = 1407558240.

The previous prime is 2121113131. The next prime is 2121113177. The reversal of 2121113155 is 5513111212.

It is not a de Polignac number, because 2121113155 - 2²⁹ = 1584242243 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 976387 + ... + 978556.

It is an arithmetic number, because the mean of its divisors is an integer number (187674624).

Almost surely, 2^2121113155 is an apocalyptic number.

2121113155 is a deficient number, since it is larger than the sum of its proper divisors (881680829).

2121113155 is a wasteful number, since it uses less digits than its factorization.

2121113155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954986.

The product of its digits is 300, while the sum is 22.

The square root of 2121113155 is about 46055.5442373663. The cubic root of 2121113155 is about 1284.8564602191.

Adding to 2121113155 its reverse (5513111212), we get a palindrome (7634224367).

The spelling of 2121113155 in words is "two billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred fifty-five".