11012721 has 8 divisors (see below), whose sum is σ = 15190080. Its totient is φ = 7088592.

The previous prime is 11012713. The next prime is 11012731. The reversal of 11012721 is 12721011.

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

It is not a de Polignac number, because 11012721 - 2³ = 11012713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11012721.

It is not an unprimeable number, because it can be changed into a prime (11012731) 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, 63205 + ... + 63378.

It is an arithmetic number, because the mean of its divisors is an integer number (1898760).

Almost surely, 2^11012721 is an apocalyptic number.

It is an amenable number.

11012721 is a deficient number, since it is larger than the sum of its proper divisors (4177359).

11012721 is a wasteful number, since it uses less digits than its factorization.

11012721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126615.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 11012721 is about 3318.5419991315. The cubic root of 11012721 is about 222.4837070929.

Adding to 11012721 its reverse (12721011), we get a palindrome (23733732).

The spelling of 11012721 in words is "eleven million, twelve thousand, seven hundred twenty-one".