121575650329 has 9 divisors (see below), whose sum is σ = 141427575381. Its totient is φ = 104205608220.

The previous prime is 121575650321. The next prime is 121575650369. The reversal of 121575650329 is 923056575121.

The square root of 121575650329 is 348677.

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

It is not a de Polignac number, because 121575650329 - 2³ = 121575650321 is a prime.

It is a super-3 number, since 3×121575650329³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121575650321) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2415834 + ... + 2465644.

Almost surely, 2^121575650329 is an apocalyptic number.

121575650329 is the 348677-th square number.

121575650329 is the 174339-th centered octagonal number.

It is an amenable number.

121575650329 is a deficient number, since it is larger than the sum of its proper divisors (19851925052).

121575650329 is an frugal number, since it uses more digits than its factorization.

121575650329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99636 (or 49818 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 46.

The spelling of 121575650329 in words is "one hundred twenty-one billion, five hundred seventy-five million, six hundred fifty thousand, three hundred twenty-nine".