2121373 has 2 divisors, whose sum is σ = 2121374.
Its totient is φ = 2121372.
The previous prime is 2121367. The next prime is 2121377. The reversal of 2121373 is 3731212.
Adding to 2121373 its reverse (3731212), we get a palindrome (5852585).
2121373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1734489 + 386884 = 1317^2 + 622^2
It is a cyclic number.
It is not a de Polignac number, because 2121373 - 25 = 2121341 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 2121373.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2121377) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060686 + 1060687.
It is an arithmetic number, because the mean of its divisors is an integer number (1060687).
22121373 is an apocalyptic number.
It is an amenable number.
2121373 is a deficient number, since it is larger than the sum of its proper divisors (1).
2121373 is an equidigital number, since it uses as much as digits as its factorization.
2121373 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 252, while the sum is 19.
The square root of 2121373 is about 1456.4933916774.
The cubic root of 2121373 is about 128.4908924793.
The spelling of 2121373 in words is "two million, one hundred twenty-one thousand, three hundred seventy-three".