1001121113 has 4 divisors (see below), whose sum is σ = 1001319888. Its totient is φ = 1000922340.

The previous prime is 1001121089. The next prime is 1001121119. The reversal of 1001121113 is 3111211001.

It is a happy number.

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 not a de Polignac number, because 1001121113 - 2¹² = 1001117017 is a prime.

It is a super-3 number, since 3×1001121113³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001121094 and 1001121103.

It is not an unprimeable number, because it can be changed into a prime (1001121119) 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, 91631 + ... + 101972.

It is an arithmetic number, because the mean of its divisors is an integer number (250329972).

Almost surely, 2^1001121113 is an apocalyptic number.

It is an amenable number.

1001121113 is a deficient number, since it is larger than the sum of its proper divisors (198775).

1001121113 is an equidigital number, since it uses as much as digits as its factorization.

1001121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198774.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1001121113 is about 31640.4979891278. The cubic root of 1001121113 is about 1000.3735647653.

Adding to 1001121113 its reverse (3111211001), we get a palindrome (4112332114).

The spelling of 1001121113 in words is "one billion, one million, one hundred twenty-one thousand, one hundred thirteen".