111112555899999 has 4 divisors (see below), whose sum is σ = 148150074533336. Its totient is φ = 74075037266664.

The previous prime is 111112555899991. The next prime is 111112555900007. The reversal of 111112555899999 is 999998555211111.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (111112555899991) and next prime (111112555900007).

It is not a de Polignac number, because 111112555899999 - 2³ = 111112555899991 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 111112555899999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112555899991) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18518759316664 + ... + 18518759316669.

It is an arithmetic number, because the mean of its divisors is an integer number (37037518633334).

Almost surely, 2^{111112555899999} is an apocalyptic number.

111112555899999 is a deficient number, since it is larger than the sum of its proper divisors (37037518633337).

111112555899999 is an equidigital number, since it uses as much as digits as its factorization.

111112555899999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37037518633336.

The product of its digits is 118098000, while the sum is 75.

The spelling of 111112555899999 in words is "one hundred eleven trillion, one hundred twelve billion, five hundred fifty-five million, eight hundred ninety-nine thousand, nine hundred ninety-nine".