1113066721 has 16 divisors (see below), whose sum is σ = 1336003200. Its totient is φ = 916109568.

The previous prime is 1113066709. The next prime is 1113066733. The reversal of 1113066721 is 1276603111.

It is an interprime number because it is at equal distance from previous prime (1113066709) and next prime (1113066733).

It is a cyclic number.

It is not a de Polignac number, because 1113066721 - 2¹⁵ = 1113033953 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 1113066721.

It is not an unprimeable number, because it can be changed into a prime (1113066701) 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 15 ways as a sum of consecutive naturals, for example, 128341 + ... + 136738.

It is an arithmetic number, because the mean of its divisors is an integer number (83500200).

Almost surely, 2^1113066721 is an apocalyptic number.

It is an amenable number.

1113066721 is a deficient number, since it is larger than the sum of its proper divisors (222936479).

1113066721 is a wasteful number, since it uses less digits than its factorization.

1113066721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265128.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1113066721 is about 33362.6545856291. The cubic root of 1113066721 is about 1036.3514659611.

Adding to 1113066721 its reverse (1276603111), we get a palindrome (2389669832).

The spelling of 1113066721 in words is "one billion, one hundred thirteen million, sixty-six thousand, seven hundred twenty-one".