1242111107 has 2 divisors, whose sum is σ = 1242111108. Its totient is φ = 1242111106.

The previous prime is 1242111061. The next prime is 1242111119. The reversal of 1242111107 is 7011112421.

It is a strong prime.

It is an emirp because it is prime and its reverse (7011112421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242111107 - 2⁶ = 1242111043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242111907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621055553 + 621055554.

It is an arithmetic number, because the mean of its divisors is an integer number (621055554).

Almost surely, 2^1242111107 is an apocalyptic number.

1242111107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242111107 is an equidigital number, since it uses as much as digits as its factorization.

1242111107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1242111107 is about 35243.5966808157. The cubic root of 1242111107 is about 1074.9464136260.

Adding to 1242111107 its reverse (7011112421), we get a palindrome (8253223528).

The spelling of 1242111107 in words is "one billion, two hundred forty-two million, one hundred eleven thousand, one hundred seven".