1320001121 has 8 divisors (see below), whose sum is σ = 1325037120. Its totient is φ = 1314973872.

The previous prime is 1320001051. The next prime is 1320001139. The reversal of 1320001121 is 1211000231.

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-1320001121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320001171) 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, 490646 + ... + 493328.

It is an arithmetic number, because the mean of its divisors is an integer number (165629640).

Almost surely, 2^1320001121 is an apocalyptic number.

It is an amenable number.

1320001121 is a deficient number, since it is larger than the sum of its proper divisors (5035999).

1320001121 is a wasteful number, since it uses less digits than its factorization.

1320001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4375.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1320001121 is about 36331.8196764214. The cubic root of 1320001121 is about 1096.9616210151.

Adding to 1320001121 its reverse (1211000231), we get a palindrome (2531001352).

The spelling of 1320001121 in words is "one billion, three hundred twenty million, one thousand, one hundred twenty-one".