2123323023265 has 16 divisors (see below), whose sum is σ = 2635922797200. Its totient is φ = 1640038240512.

The previous prime is 2123323023257. The next prime is 2123323023271. The reversal of 2123323023265 is 5623203233212.

It can be written as a sum of positive squares in 8 ways, for example, as 572304354064 + 1551018669201 = 756508^2 + 1245399^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123323023265 - 2³ = 2123323023257 is a prime.

It is a super-2 number, since 2×2123323023265² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2123323023265.

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, 5573419 + ... + 5942191.

It is an arithmetic number, because the mean of its divisors is an integer number (164745174825).

Almost surely, 2^{2123323023265} is an apocalyptic number.

It is an amenable number.

2123323023265 is a deficient number, since it is larger than the sum of its proper divisors (512599773935).

2123323023265 is a wasteful number, since it uses less digits than its factorization.

2123323023265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408516.

The product of its (nonzero) digits is 77760, while the sum is 34.

Adding to 2123323023265 its reverse (5623203233212), we get a palindrome (7746526256477).

The spelling of 2123323023265 in words is "two trillion, one hundred twenty-three billion, three hundred twenty-three million, twenty-three thousand, two hundred sixty-five".