1000120000001 has 4 divisors (see below), whose sum is σ = 1000122340932. Its totient is φ = 1000117659072.

The previous prime is 1000119999937. The next prime is 1000120000013. The reversal of 1000120000001 is 1000000210001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 751992480625 + 248127519376 = 867175^2 + 498124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000120000001 - 2⁶ = 1000119999937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000120000001.

It is not an unprimeable number, because it can be changed into a prime (1000120000021) 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, 327020 + ... + 1451613.

It is an arithmetic number, because the mean of its divisors is an integer number (250030585233).

Almost surely, 2^{1000120000001} is an apocalyptic number.

It is an amenable number.

1000120000001 is a deficient number, since it is larger than the sum of its proper divisors (2340931).

1000120000001 is an equidigital number, since it uses as much as digits as its factorization.

1000120000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340930.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 1000120000001 its reverse (1000000210001), we get a palindrome (2000120210002).

The spelling of 1000120000001 in words is "one trillion, one hundred twenty million, one", and thus it is an aban number.