1213330243 has 2 divisors, whose sum is σ = 1213330244. Its totient is φ = 1213330242.

The previous prime is 1213330241. The next prime is 1213330267. The reversal of 1213330243 is 3420333121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213330243 - 2¹ = 1213330241 is a prime.

Together with 1213330241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1213330241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606665121 + 606665122.

It is an arithmetic number, because the mean of its divisors is an integer number (606665122).

Almost surely, 2^1213330243 is an apocalyptic number.

1213330243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213330243 is an equidigital number, since it uses as much as digits as its factorization.

1213330243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 1213330243 is about 34832.8902475807. The cubic root of 1213330243 is about 1066.5789485266.

Adding to 1213330243 its reverse (3420333121), we get a palindrome (4633663364).

The spelling of 1213330243 in words is "one billion, two hundred thirteen million, three hundred thirty thousand, two hundred forty-three".