201122001001111 has 4 divisors (see below), whose sum is σ = 201153618992224. Its totient is φ = 201090383010000.

The previous prime is 201122001001081. The next prime is 201122001001171. The reversal of 201122001001111 is 111100100221102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201122001001111 - 2¹¹ = 201122000999063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122001001091 and 201122001001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201122001001171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15808986015 + ... + 15808998736.

It is an arithmetic number, because the mean of its divisors is an integer number (50288404748056).

Almost surely, 2^{201122001001111} is an apocalyptic number.

201122001001111 is a deficient number, since it is larger than the sum of its proper divisors (31617991113).

201122001001111 is an equidigital number, since it uses as much as digits as its factorization.

201122001001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31617991112.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 201122001001111 its reverse (111100100221102), we get a palindrome (312222101222213).

The spelling of 201122001001111 in words is "two hundred one trillion, one hundred twenty-two billion, one million, one thousand, one hundred eleven".