111111222100001 has 8 divisors (see below), whose sum is σ = 112228240822824. Its totient is φ = 109994534899200.

The previous prime is 111111222099991. The next prime is 111111222100013. The reversal of 111111222100001 is 100001222111111.

It can be written as a sum of positive squares in 4 ways, for example, as 4339093136401 + 106772128963600 = 2083049^2 + 10333060^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111222100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111222100091) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 82206800 + ... + 83547473.

It is an arithmetic number, because the mean of its divisors is an integer number (14028530102853).

Almost surely, 2^{111111222100001} is an apocalyptic number.

It is an amenable number.

111111222100001 is a deficient number, since it is larger than the sum of its proper divisors (1117018722823).

111111222100001 is a wasteful number, since it uses less digits than its factorization.

111111222100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165761011.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111111222100001 its reverse (100001222111111), we get a palindrome (211112444211112).

The spelling of 111111222100001 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred twenty-two million, one hundred thousand, one".