1216241177 has 2 divisors, whose sum is σ = 1216241178. Its totient is φ = 1216241176.

The previous prime is 1216241141. The next prime is 1216241227. The reversal of 1216241177 is 7711426121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804516496 + 411724681 = 28364^2 + 20291^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216241177 - 2¹⁸ = 1215979033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216241077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608120588 + 608120589.

It is an arithmetic number, because the mean of its divisors is an integer number (608120589).

Almost surely, 2^1216241177 is an apocalyptic number.

It is an amenable number.

1216241177 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216241177 is an equidigital number, since it uses as much as digits as its factorization.

1216241177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 32.

The square root of 1216241177 is about 34874.6494892780. The cubic root of 1216241177 is about 1067.4312202960.

Adding to 1216241177 its reverse (7711426121), we get a palindrome (8927667298).

The spelling of 1216241177 in words is "one billion, two hundred sixteen million, two hundred forty-one thousand, one hundred seventy-seven".