11022121121 has 4 divisors (see below), whose sum is σ = 12024132144. Its totient is φ = 10020110100.

The previous prime is 11022121087. The next prime is 11022121129. The reversal of 11022121121 is 12112122011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11022121121 - 2¹⁰ = 11022120097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11022121096 and 11022121105.

It is not an unprimeable number, because it can be changed into a prime (11022121129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501005495 + ... + 501005516.

It is an arithmetic number, because the mean of its divisors is an integer number (3006033036).

Almost surely, 2^11022121121 is an apocalyptic number.

11022121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11022121121 is a deficient number, since it is larger than the sum of its proper divisors (1002011023).

11022121121 is a wasteful number, since it uses less digits than its factorization.

11022121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002011022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11022121121 its reverse (12112122011), we get a palindrome (23134243132).

The spelling of 11022121121 in words is "eleven billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".