11202121 has 16 divisors (see below), whose sum is σ = 13271040. Its totient is φ = 9257040.

The previous prime is 11202119. The next prime is 11202131. The reversal of 11202121 is 12120211.

It is a cyclic number.

It is not a de Polignac number, because 11202121 - 2¹ = 11202119 is a prime.

It is a Duffinian number.

11202121 is a modest number, since divided by 2121 gives 1120 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11202098 and 11202107.

It is not an unprimeable number, because it can be changed into a prime (11202131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25776 + ... + 26206.

It is an arithmetic number, because the mean of its divisors is an integer number (829440).

Almost surely, 2^11202121 is an apocalyptic number.

It is an amenable number.

11202121 is a deficient number, since it is larger than the sum of its proper divisors (2068919).

11202121 is an equidigital number, since it uses as much as digits as its factorization.

11202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 11202121 is about 3346.9569761202. The cubic root of 11202121 is about 223.7519109727.

Adding to 11202121 its reverse (12120211), we get a palindrome (23322332).

The spelling of 11202121 in words is "eleven million, two hundred two thousand, one hundred twenty-one".