111222222121201 has 8 divisors (see below), whose sum is σ = 113045706189864. Its totient is φ = 109398743502720.

The previous prime is 111222222121193. The next prime is 111222222121229. The reversal of 111222222121201 is 102121222222111.

It can be written as a sum of positive squares in 4 ways, for example, as 37992442767601 + 73229779353600 = 6163801^2 + 8557440^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 111222222121201 - 2³ = 111222222121193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111222222121271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71237805 + ... + 72782341.

It is an arithmetic number, because the mean of its divisors is an integer number (14130713273733).

Almost surely, 2^{111222222121201} is an apocalyptic number.

It is an amenable number.

111222222121201 is a deficient number, since it is larger than the sum of its proper divisors (1823484068663).

111222222121201 is a wasteful number, since it uses less digits than its factorization.

111222222121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725091.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 111222222121201 its reverse (102121222222111), we get a palindrome (213343444343312).

The spelling of 111222222121201 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred one".