9208257009121 has 3 divisors (see below), whose sum is σ = 9208260043633. Its totient is φ = 9208253974610.

The previous prime is 9208257009101. The next prime is 9208257009179. The reversal of 9208257009121 is 1219007528029.

The square root of 9208257009121 is 3034511.

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.

It is not a de Polignac number, because 9208257009121 - 2⁵ = 9208257009089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9208257009101) 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, 1517256 + ... + 4551766.

Almost surely, 2^{9208257009121} is an apocalyptic number.

9208257009121 is the 3034511-st square number.

9208257009121 is the 1517256-th centered octagonal number.

It is an amenable number.

9208257009121 is a deficient number, since it is larger than the sum of its proper divisors (3034512).

9208257009121 is an frugal number, since it uses more digits than its factorization.

9208257009121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6069022 (or 3034511 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 9208257009121 in words is "nine trillion, two hundred eight billion, two hundred fifty-seven million, nine thousand, one hundred twenty-one".