1211666107 has 2 divisors, whose sum is σ = 1211666108. Its totient is φ = 1211666106.

The previous prime is 1211666069. The next prime is 1211666149. The reversal of 1211666107 is 7016661121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1211666107 - 2¹¹ = 1211664059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211666167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605833053 + 605833054.

It is an arithmetic number, because the mean of its divisors is an integer number (605833054).

Almost surely, 2^1211666107 is an apocalyptic number.

1211666107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211666107 is an equidigital number, since it uses as much as digits as its factorization.

1211666107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1211666107 is about 34808.9946278257. The cubic root of 1211666107 is about 1066.0911053858.

The spelling of 1211666107 in words is "one billion, two hundred eleven million, six hundred sixty-six thousand, one hundred seven".