1121073282721 has 8 divisors (see below), whose sum is σ = 1281534851520. Its totient is φ = 960688774608.

The previous prime is 1121073282701. The next prime is 1121073282733. The reversal of 1121073282721 is 1272823701211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121073282721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121073282701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19233991 + ... + 19292188.

It is an arithmetic number, because the mean of its divisors is an integer number (160191856440).

Almost surely, 2^{1121073282721} is an apocalyptic number.

It is an amenable number.

1121073282721 is a deficient number, since it is larger than the sum of its proper divisors (160461568799).

1121073282721 is an equidigital number, since it uses as much as digits as its factorization.

1121073282721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38530343.

The product of its (nonzero) digits is 18816, while the sum is 37.

Adding to 1121073282721 its reverse (1272823701211), we get a palindrome (2393896983932).

The spelling of 1121073282721 in words is "one trillion, one hundred twenty-one billion, seventy-three million, two hundred eighty-two thousand, seven hundred twenty-one".