121813564324 has 27 divisors (see below), whose sum is σ = 215281869411. Its totient is φ = 60310310400.

The previous prime is 121813564319. The next prime is 121813564331. The reversal of 121813564324 is 423465318121.

The square root of 121813564324 is 349018.

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

It can be written as a sum of positive squares in 4 ways, for example, as 79196090724 + 42617473600 = 281418^2 + 206440^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76085124 + ... + 76086724.

Almost surely, 2^121813564324 is an apocalyptic number.

121813564324 is the 349018-th square number.

It is an amenable number.

121813564324 is a deficient number, since it is larger than the sum of its proper divisors (93468305087).

121813564324 is an frugal number, since it uses more digits than its factorization.

121813564324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424 (or 1712 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The spelling of 121813564324 in words is "one hundred twenty-one billion, eight hundred thirteen million, five hundred sixty-four thousand, three hundred twenty-four".