2121302243 has 2 divisors, whose sum is σ = 2121302244. Its totient is φ = 2121302242.

The previous prime is 2121302219. The next prime is 2121302269. The reversal of 2121302243 is 3422031212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121302243 - 2¹⁰ = 2121301219 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121302543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060651121 + 1060651122.

It is an arithmetic number, because the mean of its divisors is an integer number (1060651122).

Almost surely, 2^2121302243 is an apocalyptic number.

2121302243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121302243 is an equidigital number, since it uses as much as digits as its factorization.

2121302243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2121302243 is about 46057.5970172131. The cubic root of 2121302243 is about 1284.8946388705.

Adding to 2121302243 its reverse (3422031212), we get a palindrome (5543333455).

The spelling of 2121302243 in words is "two billion, one hundred twenty-one million, three hundred two thousand, two hundred forty-three".