2121144145 has 8 divisors (see below), whose sum is σ = 2695100904. Its totient is φ = 1597096704.

The previous prime is 2121144133. The next prime is 2121144161. The reversal of 2121144145 is 5414411212.

It can be written as a sum of positive squares in 4 ways, for example, as 1115493201 + 1005650944 = 33399^2 + 31712^2 .

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 2121144145 - 2¹⁹ = 2120619857 is a prime.

It is a Duffinian number.

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, 12477234 + ... + 12477403.

It is an arithmetic number, because the mean of its divisors is an integer number (336887613).

Almost surely, 2^2121144145 is an apocalyptic number.

It is an amenable number.

2121144145 is a deficient number, since it is larger than the sum of its proper divisors (573956759).

2121144145 is a wasteful number, since it uses less digits than its factorization.

2121144145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24954659.

The product of its digits is 1280, while the sum is 25.

The square root of 2121144145 is about 46055.8806777158. The cubic root of 2121144145 is about 1284.8627175480.

Adding to 2121144145 its reverse (5414411212), we get a palindrome (7535555357).

It can be divided in two parts, 21211 and 44145, that added together give a palindrome (65356).

The spelling of 2121144145 in words is "two billion, one hundred twenty-one million, one hundred forty-four thousand, one hundred forty-five".