1198830097921 has 3 divisors (see below), whose sum is σ = 1198831192833. Its totient is φ = 1198829003010.

The previous prime is 1198830097853. The next prime is 1198830097931. The reversal of 1198830097921 is 1297900388911.

The square root of 1198830097921 is 1094911.

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 1198830097921 - 2¹³ = 1198830089729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1198830097931) 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, 547456 + ... + 1642366.

It is an arithmetic number, because the mean of its divisors is an integer number (399610397611).

Almost surely, 2^{1198830097921} is an apocalyptic number.

1198830097921 is the 1094911-st square number.

1198830097921 is the 547456-th centered octagonal number.

It is an amenable number.

1198830097921 is a deficient number, since it is larger than the sum of its proper divisors (1094912).

1198830097921 is an frugal number, since it uses more digits than its factorization.

1198830097921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189822 (or 1094911 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 58.

The spelling of 1198830097921 in words is "one trillion, one hundred ninety-eight billion, eight hundred thirty million, ninety-seven thousand, nine hundred twenty-one".