2121413243 has 2 divisors, whose sum is σ = 2121413244. Its totient is φ = 2121413242.

The previous prime is 2121413233. The next prime is 2121413269. The reversal of 2121413243 is 3423141212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121413243 - 2⁴ = 2121413227 is a prime.

It is a super-3 number, since 3×2121413243³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2121413233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060706621 + 1060706622.

It is an arithmetic number, because the mean of its divisors is an integer number (1060706622).

Almost surely, 2^2121413243 is an apocalyptic number.

2121413243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121413243 is an equidigital number, since it uses as much as digits as its factorization.

2121413243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 2121413243 is about 46058.8020143816. The cubic root of 2121413243 is about 1284.9170497611.

Adding to 2121413243 its reverse (3423141212), we get a palindrome (5544554455).

The spelling of 2121413243 in words is "two billion, one hundred twenty-one million, four hundred thirteen thousand, two hundred forty-three".