111110111111001 has 8 divisors (see below), whose sum is σ = 152150782782784. Its totient is φ = 72071423423280.

The previous prime is 111110111110961. The next prime is 111110111111023. The reversal of 111110111111001 is 100111111011111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111110111111001 - 2¹⁸ = 111110110848857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111110111111201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500495995885 + ... + 500495996106.

It is an arithmetic number, because the mean of its divisors is an integer number (19018847847848).

Almost surely, 2^{111110111111001} is an apocalyptic number.

It is an amenable number.

111110111111001 is a deficient number, since it is larger than the sum of its proper divisors (41040671671783).

111110111111001 is a wasteful number, since it uses less digits than its factorization.

111110111111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000991992031.

The product of its (nonzero) digits is 1, while the sum is 12.

Adding to 111110111111001 its reverse (100111111011111), we get a palindrome (211221222122112).

It can be divided in two parts, 11111011111 and 1001, that multiplied together give a palindrome (11122122122111).

The spelling of 111110111111001 in words is "one hundred eleven trillion, one hundred ten billion, one hundred eleven million, one hundred eleven thousand, one".