111981043 has 4 divisors (see below), whose sum is σ = 116849808. Its totient is φ = 107112280.

The previous prime is 111981019. The next prime is 111981059. The reversal of 111981043 is 340189111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340189111 = 29 ⋅11730659.

It is a cyclic number.

It is not a de Polignac number, because 111981043 - 2¹³ = 111972851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111961043) 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, 2434348 + ... + 2434393.

It is an arithmetic number, because the mean of its divisors is an integer number (29212452).

Almost surely, 2^111981043 is an apocalyptic number.

111981043 is a deficient number, since it is larger than the sum of its proper divisors (4868765).

111981043 is an equidigital number, since it uses as much as digits as its factorization.

111981043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4868764.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 111981043 is about 10582.1095722923. The cubic root of 111981043 is about 482.0012554274.

The spelling of 111981043 in words is "one hundred eleven million, nine hundred eighty-one thousand, forty-three".