10111216777 has 2 divisors, whose sum is σ = 10111216778. Its totient is φ = 10111216776.

The previous prime is 10111216727. The next prime is 10111216781. The reversal of 10111216777 is 77761211101.

It is a happy number.

10111216777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9964830976 + 146385801 = 99824^2 + 12099^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111216777 is a prime.

It is a super-2 number, since 2×10111216777² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10111216727) 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, 5055608388 + 5055608389.

It is an arithmetic number, because the mean of its divisors is an integer number (5055608389).

Almost surely, 2^10111216777 is an apocalyptic number.

It is an amenable number.

10111216777 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111216777 is an equidigital number, since it uses as much as digits as its factorization.

10111216777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 34.

Adding to 10111216777 its reverse (77761211101), we get a palindrome (87872427878).

The spelling of 10111216777 in words is "ten billion, one hundred eleven million, two hundred sixteen thousand, seven hundred seventy-seven".