10913221 has 4 divisors (see below), whose sum is σ = 11905344. Its totient is φ = 9921100.

The previous prime is 10913219. The next prime is 10913233. The reversal of 10913221 is 12231901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12231901 = 11 ⋅1111991.

It is a cyclic number.

It is not a de Polignac number, because 10913221 - 2¹ = 10913219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10913291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496045 + ... + 496066.

It is an arithmetic number, because the mean of its divisors is an integer number (2976336).

Almost surely, 2^10913221 is an apocalyptic number.

10913221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10913221 is a deficient number, since it is larger than the sum of its proper divisors (992123).

10913221 is an equidigital number, since it uses as much as digits as its factorization.

10913221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992122.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 10913221 is about 3303.5164597743. The cubic root of 10913221 is about 221.8116317349.

The spelling of 10913221 in words is "ten million, nine hundred thirteen thousand, two hundred twenty-one".