11021122121 has 16 divisors (see below), whose sum is σ = 11743056000. Its totient is φ = 10313856000.

The previous prime is 11021122111. The next prime is 11021122127. The reversal of 11021122121 is 12122112011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021122121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021122096 and 11021122105.

It is not an unprimeable number, because it can be changed into a prime (11021122127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855236 + ... + 868026.

It is an arithmetic number, because the mean of its divisors is an integer number (733941000).

Almost surely, 2^11021122121 is an apocalyptic number.

It is an amenable number.

11021122121 is a deficient number, since it is larger than the sum of its proper divisors (721933879).

11021122121 is a wasteful number, since it uses less digits than its factorization.

11021122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360.

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

Adding to 11021122121 its reverse (12122112011), we get a palindrome (23143234132).

The spelling of 11021122121 in words is "eleven billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".