2102340321 has 6 divisors (see below), whose sum is σ = 3036713810. Its totient is φ = 1401560208.

The previous prime is 2102340319. The next prime is 2102340379. The reversal of 2102340321 is 1230432012.

2102340321 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 340 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1521000000 + 581340321 = 39000^2 + 24111^2 .

It is not a de Polignac number, because 2102340321 - 2¹ = 2102340319 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2102340294 and 2102340303.

It is not an unprimeable number, because it can be changed into a prime (2102340311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116796676 + ... + 116796693.

Almost surely, 2^2102340321 is an apocalyptic number.

It is an amenable number.

2102340321 is a deficient number, since it is larger than the sum of its proper divisors (934373489).

2102340321 is a wasteful number, since it uses less digits than its factorization.

2102340321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233593375 (or 233593372 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2102340321 is about 45851.2848347786. The cubic root of 2102340321 is about 1281.0546973191.

Adding to 2102340321 its reverse (1230432012), we get a palindrome (3332772333).

The spelling of 2102340321 in words is "two billion, one hundred two million, three hundred forty thousand, three hundred twenty-one".