10911221 has 8 divisors (see below), whose sum is σ = 11340000. Its totient is φ = 10486000.

The previous prime is 10911217. The next prime is 10911233. The reversal of 10911221 is 12211901.

10911221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 10911221 - 2² = 10911217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10911221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10911211) 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, 6530 + ... + 8028.

It is an arithmetic number, because the mean of its divisors is an integer number (1417500).

Almost surely, 2^10911221 is an apocalyptic number.

It is an amenable number.

10911221 is a deficient number, since it is larger than the sum of its proper divisors (428779).

10911221 is a wasteful number, since it uses less digits than its factorization.

10911221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 10911221 is about 3303.2137381647. The cubic root of 10911221 is about 221.7980808817.

The spelling of 10911221 in words is "ten million, nine hundred eleven thousand, two hundred twenty-one".