9952257121 has 3 divisors (see below), whose sum is σ = 9952356883. Its totient is φ = 9952157360.

The previous prime is 9952257103. The next prime is 9952257167. The reversal of 9952257121 is 1217522599.

The square root of 9952257121 is 99761.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1217522599 = 1019 ⋅1194821.

It can be written as a sum of positive squares in only one way, i.e., 980378721 + 8971878400 = 31311^2 + 94720^2 .

It is not a de Polignac number, because 9952257121 - 2⁵ = 9952257089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9952255121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 49881 + ... + 149641.

Almost surely, 2^9952257121 is an apocalyptic number.

9952257121 is the 99761-st square number.

9952257121 is the 49881-st centered octagonal number.

It is an amenable number.

9952257121 is a deficient number, since it is larger than the sum of its proper divisors (99762).

9952257121 is an frugal number, since it uses more digits than its factorization.

9952257121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199522 (or 99761 counting only the distinct ones).

The product of its digits is 113400, while the sum is 43.

The cubic root of 9952257121 is about 2151.0005885995. Note that the first 3 decimals are identical.

The spelling of 9952257121 in words is "nine billion, nine hundred fifty-two million, two hundred fifty-seven thousand, one hundred twenty-one".