1192838381921 has 4 divisors (see below), whose sum is σ = 1192843537200. Its totient is φ = 1192833226644.

The previous prime is 1192838381881. The next prime is 1192838381923. The reversal of 1192838381921 is 1291838382911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1192838381921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1192838381923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2213411 + ... + 2699048.

It is an arithmetic number, because the mean of its divisors is an integer number (298210884300).

Almost surely, 2^{1192838381921} is an apocalyptic number.

It is an amenable number.

1192838381921 is a deficient number, since it is larger than the sum of its proper divisors (5155279).

1192838381921 is an equidigital number, since it uses as much as digits as its factorization.

1192838381921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155278.

The product of its digits is 1492992, while the sum is 56.

The spelling of 1192838381921 in words is "one trillion, one hundred ninety-two billion, eight hundred thirty-eight million, three hundred eighty-one thousand, nine hundred twenty-one".