11021100121 has 2 divisors, whose sum is σ = 11021100122. Its totient is φ = 11021100120.

The previous prime is 11021100109. The next prime is 11021100151. The reversal of 11021100121 is 12100112011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10148547600 + 872552521 = 100740^2 + 29539^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021100121 - 2¹⁵ = 11021067353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11021100098 and 11021100107.

It is not a weakly prime, because it can be changed into another prime (11021100151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510550060 + 5510550061.

It is an arithmetic number, because the mean of its divisors is an integer number (5510550061).

Almost surely, 2^11021100121 is an apocalyptic number.

It is an amenable number.

11021100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021100121 is an equidigital number, since it uses as much as digits as its factorization.

11021100121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11021100121 its reverse (12100112011), we get a palindrome (23121212132).

The spelling of 11021100121 in words is "eleven billion, twenty-one million, one hundred thousand, one hundred twenty-one".