2121310453 has 2 divisors, whose sum is σ = 2121310454. Its totient is φ = 2121310452.

The previous prime is 2121310421. The next prime is 2121310481. The reversal of 2121310453 is 3540131212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1897299364 + 224011089 = 43558^2 + 14967^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121310453 - 2⁵ = 2121310421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121310153) 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 as a sum of consecutive naturals, namely, 1060655226 + 1060655227.

It is an arithmetic number, because the mean of its divisors is an integer number (1060655227).

Almost surely, 2^2121310453 is an apocalyptic number.

It is an amenable number.

2121310453 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121310453 is an equidigital number, since it uses as much as digits as its factorization.

2121310453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2121310453 is about 46057.6861446599. The cubic root of 2121310453 is about 1284.8962964956.

Adding to 2121310453 its reverse (3540131212), we get a palindrome (5661441665).

The spelling of 2121310453 in words is "two billion, one hundred twenty-one million, three hundred ten thousand, four hundred fifty-three".