111820789081 has 16 divisors (see below), whose sum is σ = 115078163200. Its totient is φ = 108594597888.

The previous prime is 111820789057. The next prime is 111820789103. The reversal of 111820789081 is 180987028111.

It is a cyclic number.

It is not a de Polignac number, because 111820789081 - 2⁷ = 111820788953 is a prime.

It is a super-2 number, since 2×111820789081² (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 (111820789481) 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, 7564960 + ... + 7579726.

It is an arithmetic number, because the mean of its divisors is an integer number (7192385200).

Almost surely, 2^111820789081 is an apocalyptic number.

It is an amenable number.

111820789081 is a deficient number, since it is larger than the sum of its proper divisors (3257374119).

111820789081 is a wasteful number, since it uses less digits than its factorization.

111820789081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15808.

The product of its (nonzero) digits is 64512, while the sum is 46.

The spelling of 111820789081 in words is "one hundred eleven billion, eight hundred twenty million, seven hundred eighty-nine thousand, eighty-one".