11202281 has 4 divisors (see below), whose sum is σ = 11212500. Its totient is φ = 11192064.

The previous prime is 11202263. The next prime is 11202283. The reversal of 11202281 is 18220211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18220211 = 1487 ⋅12253.

It can be written as a sum of positive squares in 2 ways, for example, as 5248681 + 5953600 = 2291^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 11202281 - 2²² = 7007977 is a prime.

It is a super-2 number, since 2×11202281² = 250982199205922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11202283) 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, 3236 + ... + 5733.

It is an arithmetic number, because the mean of its divisors is an integer number (2803125).

Almost surely, 2^11202281 is an apocalyptic number.

It is an amenable number.

11202281 is a deficient number, since it is larger than the sum of its proper divisors (10219).

11202281 is an equidigital number, since it uses as much as digits as its factorization.

11202281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10218.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 11202281 is about 3346.9808783439. The cubic root of 11202281 is about 223.7529762512.

Adding to 11202281 its reverse (18220211), we get a palindrome (29422492).

The spelling of 11202281 in words is "eleven million, two hundred two thousand, two hundred eighty-one".