1001001121 has 8 divisors (see below), whose sum is σ = 1011646944. Its totient is φ = 990386880.

The previous prime is 1001001119. The next prime is 1001001137. The reversal of 1001001121 is 1211001001.

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

It is a cyclic number.

It is not a de Polignac number, because 1001001121 - 2¹ = 1001001119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001001151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58786 + ... + 73876.

It is an arithmetic number, because the mean of its divisors is an integer number (126455868).

Almost surely, 2^1001001121 is an apocalyptic number.

It is an amenable number.

1001001121 is a deficient number, since it is larger than the sum of its proper divisors (10645823).

1001001121 is a wasteful number, since it uses less digits than its factorization.

1001001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15791.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1001001121 is about 31638.6017548184. The cubic root of 1001001121 is about 1000.3335957015. Note that the first 3 decimals are identical.

Adding to 1001001121 its reverse (1211001001), we get a palindrome (2212002122).

It can be divided in two parts, 1001001 and 121, that multiplied together give a palindrome (121121121).

The spelling of 1001001121 in words is "one billion, one million, one thousand, one hundred twenty-one".