9521047121 has 2 divisors, whose sum is σ = 9521047122. Its totient is φ = 9521047120.

The previous prime is 9521047111. The next prime is 9521047139. The reversal of 9521047121 is 1217401259.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9022150225 + 498896896 = 94985^2 + 22336^2 .

It is a cyclic number.

It is not a de Polignac number, because 9521047121 - 2²² = 9516852817 is a prime.

It is not a weakly prime, because it can be changed into another prime (9521047111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4760523560 + 4760523561.

It is an arithmetic number, because the mean of its divisors is an integer number (4760523561).

Almost surely, 2^9521047121 is an apocalyptic number.

It is an amenable number.

9521047121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9521047121 is an equidigital number, since it uses as much as digits as its factorization.

9521047121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 9521047121 is about 97575.8531656270. The cubic root of 9521047121 is about 2119.4747067618.

The spelling of 9521047121 in words is "nine billion, five hundred twenty-one million, forty-seven thousand, one hundred twenty-one".