1218941107 has 2 divisors, whose sum is σ = 1218941108. Its totient is φ = 1218941106.

The previous prime is 1218941083. The next prime is 1218941177. The reversal of 1218941107 is 7011498121.

It is a weak prime.

It is an emirp because it is prime and its reverse (7011498121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218941107 is a prime.

It is a super-3 number, since 3×1218941107³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1218941177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609470553 + 609470554.

It is an arithmetic number, because the mean of its divisors is an integer number (609470554).

Almost surely, 2^1218941107 is an apocalyptic number.

1218941107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218941107 is an equidigital number, since it uses as much as digits as its factorization.

1218941107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1218941107 is about 34913.3370934375. The cubic root of 1218941107 is about 1068.2204989583.

The spelling of 1218941107 in words is "one billion, two hundred eighteen million, nine hundred forty-one thousand, one hundred seven".