111111110100061 has 2 divisors, whose sum is σ = 111111110100062. Its totient is φ = 111111110100060.

The previous prime is 111111110099989. The next prime is 111111110100217. The reversal of 111111110100061 is 160001011111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66445012207161 + 44666097892900 = 8151381^2 + 6683270^2 .

It is an emirp because it is prime and its reverse (160001011111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111111110100061 - 2¹³ = 111111110091869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111110109061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555555050030 + 55555555050031.

It is an arithmetic number, because the mean of its divisors is an integer number (55555555050031).

Almost surely, 2^{111111110100061} is an apocalyptic number.

It is an amenable number.

111111110100061 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111110100061 is an equidigital number, since it uses as much as digits as its factorization.

111111110100061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 16.

Adding to 111111110100061 its reverse (160001011111111), we get a palindrome (271112121211172).

The spelling of 111111110100061 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred ten million, one hundred thousand, sixty-one".