11030721 has 16 divisors (see below), whose sum is σ = 15985536. Its totient is φ = 6725376.

The previous prime is 11030717. The next prime is 11030741. The reversal of 11030721 is 12703011.

It is not a de Polignac number, because 11030721 - 2² = 11030717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11030721.

It is not an unprimeable number, because it can be changed into a prime (11030711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3156 + ... + 5658.

It is an arithmetic number, because the mean of its divisors is an integer number (999096).

Almost surely, 2^11030721 is an apocalyptic number.

It is an amenable number.

11030721 is a deficient number, since it is larger than the sum of its proper divisors (4954815).

11030721 is a wasteful number, since it uses less digits than its factorization.

11030721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 11030721 is about 3321.2529262313. The cubic root of 11030721 is about 222.6048556824.

Adding to 11030721 its reverse (12703011), we get a palindrome (23733732).

The spelling of 11030721 in words is "eleven million, thirty thousand, seven hundred twenty-one".