9921001232 has 20 divisors (see below), whose sum is σ = 19225709580. Its totient is φ = 4959527808.

The previous prime is 9921001229. The next prime is 9921001241. The reversal of 9921001232 is 2321001299.

9921001232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9669968896 + 251032336 = 98336^2 + 15844^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9921001195 and 9921001204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27194 + ... + 143462.

It is an arithmetic number, because the mean of its divisors is an integer number (961285479).

Almost surely, 2^9921001232 is an apocalyptic number.

It is an amenable number.

9921001232 is a deficient number, since it is larger than the sum of its proper divisors (9304708348).

9921001232 is a wasteful number, since it uses less digits than its factorization.

9921001232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121610 (or 121604 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 9921001232 is about 99604.2229626837. Note that the first 3 decimals coincide. The cubic root of 9921001232 is about 2148.7464285685.

The spelling of 9921001232 in words is "nine billion, nine hundred twenty-one million, one thousand, two hundred thirty-two".