111161123077 has 2 divisors, whose sum is σ = 111161123078. Its totient is φ = 111161123076.

The previous prime is 111161123063. The next prime is 111161123141. The reversal of 111161123077 is 770321161111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85171169281 + 25989953796 = 291841^2 + 161214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111161123077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111161123027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55580561538 + 55580561539.

It is an arithmetic number, because the mean of its divisors is an integer number (55580561539).

Almost surely, 2^111161123077 is an apocalyptic number.

It is an amenable number.

111161123077 is a deficient number, since it is larger than the sum of its proper divisors (1).

111161123077 is an equidigital number, since it uses as much as digits as its factorization.

111161123077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 31.

Adding to 111161123077 its reverse (770321161111), we get a palindrome (881482284188).

The spelling of 111161123077 in words is "one hundred eleven billion, one hundred sixty-one million, one hundred twenty-three thousand, seventy-seven".