1218920107 has 2 divisors, whose sum is σ = 1218920108. Its totient is φ = 1218920106.

The previous prime is 1218920089. The next prime is 1218920123. The reversal of 1218920107 is 7010298121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218920107 - 2¹⁵ = 1218887339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218920147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609460053 + 609460054.

It is an arithmetic number, because the mean of its divisors is an integer number (609460054).

Almost surely, 2^1218920107 is an apocalyptic number.

1218920107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218920107 is an equidigital number, since it uses as much as digits as its factorization.

1218920107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 1218920107 is about 34913.0363474734. The cubic root of 1218920107 is about 1068.2143644647.

The spelling of 1218920107 in words is "one billion, two hundred eighteen million, nine hundred twenty thousand, one hundred seven".