111111102100019 has 16 divisors (see below), whose sum is σ = 127921984689600. Its totient is φ = 94535542769280.

The previous prime is 111111102099979. The next prime is 111111102100027. The reversal of 111111102100019 is 910001201111111.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111102100019 is a prime.

It is a super-2 number, since 2×111111102100019² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111102100039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34119392 + ... + 37233789.

It is an arithmetic number, because the mean of its divisors is an integer number (7995124043100).

Almost surely, 2^{111111102100019} is an apocalyptic number.

111111102100019 is a deficient number, since it is larger than the sum of its proper divisors (16810882589581).

111111102100019 is a wasteful number, since it uses less digits than its factorization.

111111102100019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71354830.

The product of its (nonzero) digits is 18, while the sum is 20.

The spelling of 111111102100019 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred two million, one hundred thousand, nineteen".