2165422230321 has 16 divisors (see below), whose sum is σ = 3299877619584. Its totient is φ = 1237314155904.

The previous prime is 2165422230269. The next prime is 2165422230337. The reversal of 2165422230321 is 1230322245612.

It is not a de Polignac number, because 2165422230321 - 2¹¹ = 2165422228273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2165422230721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2534310 + ... + 3279263.

It is an arithmetic number, because the mean of its divisors is an integer number (206242351224).

Almost surely, 2^{2165422230321} is an apocalyptic number.

2165422230321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2165422230321 is a deficient number, since it is larger than the sum of its proper divisors (1134455389263).

2165422230321 is a wasteful number, since it uses less digits than its factorization.

2165422230321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831320.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 2165422230321 its reverse (1230322245612), we get a palindrome (3395744475933).

The spelling of 2165422230321 in words is "two trillion, one hundred sixty-five billion, four hundred twenty-two million, two hundred thirty thousand, three hundred twenty-one".