11122021121 has 4 divisors (see below), whose sum is σ = 11232140244. Its totient is φ = 11011902000.

The previous prime is 11122021117. The next prime is 11122021181. The reversal of 11122021121 is 12112022111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9714270721 + 1407750400 = 98561^2 + 37520^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122021121 - 2² = 11122021117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11122021096 and 11122021105.

It is not an unprimeable number, because it can be changed into a prime (11122021181) 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, 55059410 + ... + 55059611.

It is an arithmetic number, because the mean of its divisors is an integer number (2808035061).

Almost surely, 2^11122021121 is an apocalyptic number.

It is an amenable number.

11122021121 is a deficient number, since it is larger than the sum of its proper divisors (110119123).

11122021121 is a wasteful number, since it uses less digits than its factorization.

11122021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110119122.

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

Adding to 11122021121 its reverse (12112022111), we get a palindrome (23234043232).

The spelling of 11122021121 in words is "eleven billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty-one".