111918310001 has 4 divisors (see below), whose sum is σ = 115777562100. Its totient is φ = 108059057904.

The previous prime is 111918309991. The next prime is 111918310019. The reversal of 111918310001 is 100013819111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 78091743601 + 33826566400 = 279449^2 + 183920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111918310001 is a prime.

It is a super-2 number, since 2×111918310001² (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 (111918330001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1929626006 + ... + 1929626063.

It is an arithmetic number, because the mean of its divisors is an integer number (28944390525).

Almost surely, 2^111918310001 is an apocalyptic number.

It is an amenable number.

111918310001 is a deficient number, since it is larger than the sum of its proper divisors (3859252099).

111918310001 is an equidigital number, since it uses as much as digits as its factorization.

111918310001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859252098.

The product of its (nonzero) digits is 216, while the sum is 26.

The spelling of 111918310001 in words is "one hundred eleven billion, nine hundred eighteen million, three hundred ten thousand, one".