1001320121 has 8 divisors (see below), whose sum is σ = 1056316800. Its totient is φ = 946553040.

The previous prime is 1001320097. The next prime is 1001320139. The reversal of 1001320121 is 1210231001.

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-1001320121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001320321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48401 + ... + 65918.

It is an arithmetic number, because the mean of its divisors is an integer number (132039600).

Almost surely, 2^1001320121 is an apocalyptic number.

It is an amenable number.

1001320121 is a deficient number, since it is larger than the sum of its proper divisors (54996679).

1001320121 is a wasteful number, since it uses less digits than its factorization.

1001320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114799.

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

The square root of 1001320121 is about 31643.6426632586. The cubic root of 1001320121 is about 1000.4398468397.

Adding to 1001320121 its reverse (1210231001), we get a palindrome (2211551122).

The spelling of 1001320121 in words is "one billion, one million, three hundred twenty thousand, one hundred twenty-one".