20002001121205 has 8 divisors (see below), whose sum is σ = 24002946907992. Its totient is φ = 16001237188608.

The previous prime is 20002001121163. The next prime is 20002001121247. The reversal of 20002001121205 is 50212110020002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20002001121163) and next prime (20002001121247).

It can be written as a sum of positive squares in 4 ways, for example, as 3433527468484 + 16568473652721 = 1852978^2 + 4070439^2 .

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 20002001121205 - 2¹³ = 20002001113013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45221452 + ... + 45661621.

It is an arithmetic number, because the mean of its divisors is an integer number (3000368363499).

Almost surely, 2^{20002001121205} is an apocalyptic number.

It is an amenable number.

20002001121205 is a deficient number, since it is larger than the sum of its proper divisors (4000945786787).

20002001121205 is an equidigital number, since it uses as much as digits as its factorization.

20002001121205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90927095.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20002001121205 its reverse (50212110020002), we get a palindrome (70214111141207).

The spelling of 20002001121205 in words is "twenty trillion, two billion, one million, one hundred twenty-one thousand, two hundred five".