1213111307 has 2 divisors, whose sum is σ = 1213111308. Its totient is φ = 1213111306.

The previous prime is 1213111283. The next prime is 1213111327. The reversal of 1213111307 is 7031113121.

It is an a-pointer prime, because the next prime (1213111327) can be obtained adding 1213111307 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213111307 - 2⁶ = 1213111243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213111327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606555653 + 606555654.

It is an arithmetic number, because the mean of its divisors is an integer number (606555654).

Almost surely, 2^1213111307 is an apocalyptic number.

1213111307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213111307 is an equidigital number, since it uses as much as digits as its factorization.

1213111307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1213111307 is about 34829.7474438159. The cubic root of 1213111307 is about 1066.5147927107.

Adding to 1213111307 its reverse (7031113121), we get a palindrome (8244224428).

The spelling of 1213111307 in words is "one billion, two hundred thirteen million, one hundred eleven thousand, three hundred seven".