11078221 has 8 divisors (see below), whose sum is σ = 13811904. Its totient is φ = 8632320.

The previous prime is 11078213. The next prime is 11078251. The reversal of 11078221 is 12287011.

11078221 = 188² + 189² + ... + 341².

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 11078221 - 2³ = 11078213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11078192 and 11078201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11078251) 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, 71860 + ... + 72013.

It is an arithmetic number, because the mean of its divisors is an integer number (1726488).

Almost surely, 2^11078221 is an apocalyptic number.

11078221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11078221 is a deficient number, since it is larger than the sum of its proper divisors (2733683).

11078221 is a wasteful number, since it uses less digits than its factorization.

11078221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143891.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 11078221 is about 3328.3961603151. The cubic root of 11078221 is about 222.9239218454.

The spelling of 11078221 in words is "eleven million, seventy-eight thousand, two hundred twenty-one".