11111122201121 has 8 divisors (see below), whose sum is σ = 11353626689664. Its totient is φ = 10868871780720.

The previous prime is 11111122201103. The next prime is 11111122201219. The reversal of 11111122201121 is 12110222111111.

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-11111122201121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111122201121.

It is not an unprimeable number, because it can be changed into a prime (11111122201021) 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, 63428615 + ... + 63603548.

It is an arithmetic number, because the mean of its divisors is an integer number (1419203336208).

Almost surely, 2^{11111122201121} is an apocalyptic number.

It is an amenable number.

11111122201121 is a deficient number, since it is larger than the sum of its proper divisors (242504488543).

11111122201121 is a wasteful number, since it uses less digits than its factorization.

11111122201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127034071.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11111122201121 its reverse (12110222111111), we get a palindrome (23221344312232).

The spelling of 11111122201121 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-two million, two hundred one thousand, one hundred twenty-one".