2121310423 has 8 divisors (see below), whose sum is σ = 2234700720. Its totient is φ = 2008094400.

The previous prime is 2121310421. The next prime is 2121310453. The reversal of 2121310423 is 3240131212.

It is a happy number.

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 2121310423 - 2¹ = 2121310421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121310423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121310421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18190 + ... + 67627.

It is an arithmetic number, because the mean of its divisors is an integer number (279337590).

Almost surely, 2^2121310423 is an apocalyptic number.

2121310423 is a deficient number, since it is larger than the sum of its proper divisors (113390297).

2121310423 is a wasteful number, since it uses less digits than its factorization.

2121310423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87137.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2121310423 is about 46057.6858189814. The cubic root of 2121310423 is about 1284.8962904385.

Adding to 2121310423 its reverse (3240131212), we get a palindrome (5361441635).

The spelling of 2121310423 in words is "two billion, one hundred twenty-one million, three hundred ten thousand, four hundred twenty-three".