11361221 has 8 divisors (see below), whose sum is σ = 12345600. Its totient is φ = 10415520.

The previous prime is 11361211. The next prime is 11361247. The reversal of 11361221 is 12216311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11361221 - 2⁶ = 11361157 is a prime.

It is a super-2 number, since 2×11361221² = 258154685221682, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 11361221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11361211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9056 + ... + 10233.

It is an arithmetic number, because the mean of its divisors is an integer number (1543200).

Almost surely, 2^11361221 is an apocalyptic number.

It is an amenable number.

11361221 is a deficient number, since it is larger than the sum of its proper divisors (984379).

11361221 is a wasteful number, since it uses less digits than its factorization.

11361221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19339.

The product of its digits is 72, while the sum is 17.

The square root of 11361221 is about 3370.6410369542. The cubic root of 11361221 is about 224.8062265829.

Adding to 11361221 its reverse (12216311), we get a palindrome (23577532).

The spelling of 11361221 in words is "eleven million, three hundred sixty-one thousand, two hundred twenty-one".