1110111112861 has 2 divisors, whose sum is σ = 1110111112862. Its totient is φ = 1110111112860.

The previous prime is 1110111112823. The next prime is 1110111112867. The reversal of 1110111112861 is 1682111110111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620014508100 + 490096604761 = 787410^2 + 700069^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110111112861 - 2²¹ = 1110109015709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110111112867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555055556430 + 555055556431.

It is an arithmetic number, because the mean of its divisors is an integer number (555055556431).

Almost surely, 2^{1110111112861} is an apocalyptic number.

It is an amenable number.

1110111112861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110111112861 is an equidigital number, since it uses as much as digits as its factorization.

1110111112861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 25.

Adding to 1110111112861 its reverse (1682111110111), we get a palindrome (2792222222972).

The spelling of 1110111112861 in words is "one trillion, one hundred ten billion, one hundred eleven million, one hundred twelve thousand, eight hundred sixty-one".