2165123433133 has 16 divisors (see below), whose sum is σ = 2357327339136. Its totient is φ = 1980502351360.

The previous prime is 2165123433127. The next prime is 2165123433163. The reversal of 2165123433133 is 3313343215612.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2165123433133 - 2⁵ = 2165123433101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165123433092 and 2165123433101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165123433163) 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, 5722291 + ... + 6088912.

It is an arithmetic number, because the mean of its divisors is an integer number (147332958696).

Almost surely, 2^{2165123433133} is an apocalyptic number.

It is an amenable number.

2165123433133 is a deficient number, since it is larger than the sum of its proper divisors (192203906003).

2165123433133 is a wasteful number, since it uses less digits than its factorization.

2165123433133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11811524.

The product of its digits is 116640, while the sum is 37.

Adding to 2165123433133 its reverse (3313343215612), we get a palindrome (5478466648745).

The spelling of 2165123433133 in words is "two trillion, one hundred sixty-five billion, one hundred twenty-three million, four hundred thirty-three thousand, one hundred thirty-three".