1213122347 has 2 divisors, whose sum is σ = 1213122348. Its totient is φ = 1213122346.

The previous prime is 1213122343. The next prime is 1213122371. The reversal of 1213122347 is 7432213121.

It is a weak prime.

It is an emirp because it is prime and its reverse (7432213121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213122347 - 2² = 1213122343 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213122343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606561173 + 606561174.

It is an arithmetic number, because the mean of its divisors is an integer number (606561174).

Almost surely, 2^1213122347 is an apocalyptic number.

1213122347 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213122347 is an equidigital number, since it uses as much as digits as its factorization.

1213122347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 1213122347 is about 34829.9059286700. The cubic root of 1213122347 is about 1066.5180279971.

Adding to 1213122347 its reverse (7432213121), we get a palindrome (8645335468).

The spelling of 1213122347 in words is "one billion, two hundred thirteen million, one hundred twenty-two thousand, three hundred forty-seven".