201111222112001 has 4 divisors (see below), whose sum is σ = 201111550795092. Its totient is φ = 201110893428912.

The previous prime is 201111222111977. The next prime is 201111222112007. The reversal of 201111222112001 is 100211222111102.

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 70851343320976 + 130259878791025 = 8417324^2 + 11413145^2 .

It is a cyclic number.

It is not a de Polignac number, because 201111222112001 - 2²² = 201111217917697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111222112007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163422026 + ... + 164648051.

It is an arithmetic number, because the mean of its divisors is an integer number (50277887698773).

Almost surely, 2^{201111222112001} is an apocalyptic number.

It is an amenable number.

201111222112001 is a deficient number, since it is larger than the sum of its proper divisors (328683091).

201111222112001 is an equidigital number, since it uses as much as digits as its factorization.

201111222112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328683090.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201111222112001 its reverse (100211222111102), we get a palindrome (301322444223103).

The spelling of 201111222112001 in words is "two hundred one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, one".