9930011521 has 8 divisors (see below), whose sum is σ = 9963369000. Its totient is φ = 9896697600.

The previous prime is 9930011501. The next prime is 9930011551. The reversal of 9930011521 is 1251100399.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7476196225 + 2453815296 = 86465^2 + 49536^2 .

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 9930011521 - 2⁷ = 9930011393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9930011501) 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, 482755 + ... + 502903.

It is an arithmetic number, because the mean of its divisors is an integer number (1245421125).

Almost surely, 2^9930011521 is an apocalyptic number.

It is an amenable number.

9930011521 is a deficient number, since it is larger than the sum of its proper divisors (33357479).

9930011521 is a wasteful number, since it uses less digits than its factorization.

9930011521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21779.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 9930011521 is about 99649.4431544903. The cubic root of 9930011521 is about 2149.3967314839.

The spelling of 9930011521 in words is "nine billion, nine hundred thirty million, eleven thousand, five hundred twenty-one".