111110111009869 has 2 divisors, whose sum is σ = 111110111009870. Its totient is φ = 111110111009868.

The previous prime is 111110111009867. The next prime is 111110111010109. The reversal of 111110111009869 is 968900111011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107732712436969 + 3377398572900 = 10379437^2 + 1837770^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110111009869 - 2¹ = 111110111009867 is a prime.

It is a super-2 number, since 2×111110111009869² (a number of 29 digits) contains 22 as substring.

Together with 111110111009867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111110111009867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555055504934 + 55555055504935.

It is an arithmetic number, because the mean of its divisors is an integer number (55555055504935).

Almost surely, 2^{111110111009869} is an apocalyptic number.

It is an amenable number.

111110111009869 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110111009869 is an equidigital number, since it uses as much as digits as its factorization.

111110111009869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 40.

The spelling of 111110111009869 in words is "one hundred eleven trillion, one hundred ten billion, one hundred eleven million, nine thousand, eight hundred sixty-nine".