111989215435 has 4 divisors (see below), whose sum is σ = 134387058528. Its totient is φ = 89591372344.

The previous prime is 111989215421. The next prime is 111989215463. The reversal of 111989215435 is 534512989111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 534512989111 = 37 ⋅14446297003.

It is a cyclic number.

It is not a de Polignac number, because 111989215435 - 2³⁵ = 77629477067 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11198921539 + ... + 11198921548.

It is an arithmetic number, because the mean of its divisors is an integer number (33596764632).

Almost surely, 2^111989215435 is an apocalyptic number.

111989215435 is a deficient number, since it is larger than the sum of its proper divisors (22397843093).

111989215435 is an equidigital number, since it uses as much as digits as its factorization.

111989215435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22397843092.

The product of its digits is 388800, while the sum is 49.

The spelling of 111989215435 in words is "one hundred eleven billion, nine hundred eighty-nine million, two hundred fifteen thousand, four hundred thirty-five".