11201121222111 has 12 divisors (see below), whose sum is σ = 16616678329992. Its totient is φ = 7265592143856.

The previous prime is 11201121222001. The next prime is 11201121222241. The reversal of 11201121222111 is 11122212110211.

It is a happy number.

11201121222111 is a `hidden beast` number, since 11 + 201 + 121 + 222 + 111 = 666.

It is not a de Polignac number, because 11201121222111 - 2¹¹ = 11201121220063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201121222311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16818500001 + ... + 16818500666.

It is an arithmetic number, because the mean of its divisors is an integer number (1384723194166).

Almost surely, 2^{11201121222111} is an apocalyptic number.

11201121222111 is a deficient number, since it is larger than the sum of its proper divisors (5415557107881).

11201121222111 is a wasteful number, since it uses less digits than its factorization.

11201121222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33637000710 (or 33637000707 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11201121222111 its reverse (11122212110211), we get a palindrome (22323333332322).

The spelling of 11201121222111 in words is "eleven trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".