2121323 has 2 divisors, whose sum is σ = 2121324. Its totient is φ = 2121322.

The previous prime is 2121289. The next prime is 2121337. The reversal of 2121323 is 3231212.

It is a happy number.

2121323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2121337) can be obtained adding 2121323 to its sum of digits (14).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121323 is a prime.

It is a super-2 number, since 2×2121323² = 9000022540658, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2121298 and 2121307.

It is not a weakly prime, because it can be changed into another prime (2121373) 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, 1060661 + 1060662.

It is an arithmetic number, because the mean of its divisors is an integer number (1060662).

2^2121323 is an apocalyptic number.

2121323 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121323 is an equidigital number, since it uses as much as digits as its factorization.

2121323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 14.

The square root of 2121323 is about 1456.4762270631. The cubic root of 2121323 is about 128.4898829766.

Adding to 2121323 its reverse (3231212), we get a palindrome (5352535).

The spelling of 2121323 in words is "two million, one hundred twenty-one thousand, three hundred twenty-three".