1212331243 has 2 divisors, whose sum is σ = 1212331244. Its totient is φ = 1212331242.

The previous prime is 1212331231. The next prime is 1212331273. The reversal of 1212331243 is 3421332121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212331243 - 2⁹ = 1212330731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212331213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606165621 + 606165622.

It is an arithmetic number, because the mean of its divisors is an integer number (606165622).

Almost surely, 2^1212331243 is an apocalyptic number.

1212331243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212331243 is an equidigital number, since it uses as much as digits as its factorization.

1212331243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 1212331243 is about 34818.5473993388. The cubic root of 1212331243 is about 1066.2861442274.

Adding to 1212331243 its reverse (3421332121), we get a palindrome (4633663364).

The spelling of 1212331243 in words is "one billion, two hundred twelve million, three hundred thirty-one thousand, two hundred forty-three".