11202112121 has 2 divisors, whose sum is σ = 11202112122. Its totient is φ = 11202112120.

The previous prime is 11202112111. The next prime is 11202112151. The reversal of 11202112121 is 12121120211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5649626896 + 5552485225 = 75164^2 + 74515^2 .

It is a cyclic number.

It is not a de Polignac number, because 11202112121 - 2³⁰ = 10128370297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11202112096 and 11202112105.

It is not a weakly prime, because it can be changed into another prime (11202112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601056060 + 5601056061.

It is an arithmetic number, because the mean of its divisors is an integer number (5601056061).

Almost surely, 2^11202112121 is an apocalyptic number.

It is an amenable number.

11202112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11202112121 is an equidigital number, since it uses as much as digits as its factorization.

11202112121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11202112121 its reverse (12121120211), we get a palindrome (23323232332).

The spelling of 11202112121 in words is "eleven billion, two hundred two million, one hundred twelve thousand, one hundred twenty-one".