1216601207 has 2 divisors, whose sum is σ = 1216601208. Its totient is φ = 1216601206.

The previous prime is 1216601171. The next prime is 1216601219. The reversal of 1216601207 is 7021066121.

It is a strong prime.

It is an emirp because it is prime and its reverse (7021066121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216601207 - 2⁶ = 1216601143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216601297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608300603 + 608300604.

It is an arithmetic number, because the mean of its divisors is an integer number (608300604).

Almost surely, 2^1216601207 is an apocalyptic number.

1216601207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216601207 is an equidigital number, since it uses as much as digits as its factorization.

1216601207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1216601207 is about 34879.8108796478. The cubic root of 1216601207 is about 1067.5365364003.

Adding to 1216601207 its reverse (7021066121), we get a palindrome (8237667328).

The spelling of 1216601207 in words is "one billion, two hundred sixteen million, six hundred one thousand, two hundred seven".