2121113145 has 16 divisors (see below), whose sum is σ = 3394449792. Its totient is φ = 1131037440.

The previous prime is 2121113131. The next prime is 2121113177. The reversal of 2121113145 is 5413111212.

It is not a de Polignac number, because 2121113145 - 2⁴ = 2121113129 is a prime.

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, 89500 + ... + 110690.

It is an arithmetic number, because the mean of its divisors is an integer number (212153112).

Almost surely, 2^2121113145 is an apocalyptic number.

It is an amenable number.

2121113145 is a deficient number, since it is larger than the sum of its proper divisors (1273336647).

2121113145 is a wasteful number, since it uses less digits than its factorization.

2121113145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27872.

The product of its digits is 240, while the sum is 21.

The square root of 2121113145 is about 46055.5441288017. The cubic root of 2121113145 is about 1284.8564581999.

Adding to 2121113145 its reverse (5413111212), we get a palindrome (7534224357).

The spelling of 2121113145 in words is "two billion, one hundred twenty-one million, one hundred thirteen thousand, one hundred forty-five".