11216621 has 8 divisors (see below), whose sum is σ = 12117504. Its totient is φ = 10321200.

The previous prime is 11216603. The next prime is 11216627. The reversal of 11216621 is 12661211.

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 11216621 - 2¹⁴ = 11200237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11216593 and 11216602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11216627) 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, 3596 + ... + 5946.

It is an arithmetic number, because the mean of its divisors is an integer number (1514688).

Almost surely, 2^11216621 is an apocalyptic number.

It is an amenable number.

11216621 is a deficient number, since it is larger than the sum of its proper divisors (900883).

11216621 is a wasteful number, since it uses less digits than its factorization.

11216621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2731.

The product of its digits is 144, while the sum is 20.

The square root of 11216621 is about 3349.1224223668. The cubic root of 11216621 is about 223.8484106703.

Adding to 11216621 its reverse (12661211), we get a palindrome (23877832).

The spelling of 11216621 in words is "eleven million, two hundred sixteen thousand, six hundred twenty-one".