11201121011 has 4 divisors (see below), whose sum is σ = 11230675800. Its totient is φ = 11171566224.

The previous prime is 11201120989. The next prime is 11201121017. The reversal of 11201121011 is 11012110211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11012110211 = 20947 ⋅525713.

It is a cyclic number.

It is not a de Polignac number, because 11201121011 - 2⁶ = 11201120947 is a prime.

It is a super-2 number, since 2×11201121011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201120983 and 11201121001.

It is not an unprimeable number, because it can be changed into a prime (11201121017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14776826 + ... + 14777583.

It is an arithmetic number, because the mean of its divisors is an integer number (2807668950).

Almost surely, 2^11201121011 is an apocalyptic number.

11201121011 is a deficient number, since it is larger than the sum of its proper divisors (29554789).

11201121011 is an equidigital number, since it uses as much as digits as its factorization.

11201121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29554788.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11201121011 its reverse (11012110211), we get a palindrome (22213231222).

The spelling of 11201121011 in words is "eleven billion, two hundred one million, one hundred twenty-one thousand, eleven".