11201021121 has 16 divisors (see below), whose sum is σ = 14990676480. Its totient is φ = 7439404800.

The previous prime is 11201021119. The next prime is 11201021129. The reversal of 11201021121 is 12112010211.

It is not a de Polignac number, because 11201021121 - 2¹ = 11201021119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11201021097 and 11201021106.

It is not an unprimeable number, because it can be changed into a prime (11201021129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1032795 + ... + 1043583.

It is an arithmetic number, because the mean of its divisors is an integer number (936917280).

Almost surely, 2^11201021121 is an apocalyptic number.

It is an amenable number.

11201021121 is a deficient number, since it is larger than the sum of its proper divisors (3789655359).

11201021121 is a wasteful number, since it uses less digits than its factorization.

11201021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12056.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11201021121 its reverse (12112010211), we get a palindrome (23313031332).

The spelling of 11201021121 in words is "eleven billion, two hundred one million, twenty-one thousand, one hundred twenty-one".