111243112019 has 4 divisors (see below), whose sum is σ = 119800274496. Its totient is φ = 102685949544.

The previous prime is 111243111961. The next prime is 111243112039. The reversal of 111243112019 is 910211342111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910211342111 = 195659 ⋅4652029.

It is a cyclic number.

It is not a de Polignac number, because 111243112019 - 2¹⁶ = 111243046483 is a prime.

It is a super-2 number, since 2×111243112019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111243112039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4278581219 + ... + 4278581244.

It is an arithmetic number, because the mean of its divisors is an integer number (29950068624).

Almost surely, 2^111243112019 is an apocalyptic number.

111243112019 is a deficient number, since it is larger than the sum of its proper divisors (8557162477).

111243112019 is an equidigital number, since it uses as much as digits as its factorization.

111243112019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8557162476.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 111243112019 in words is "one hundred eleven billion, two hundred forty-three million, one hundred twelve thousand, nineteen".