20001012121001 has 8 divisors (see below), whose sum is σ = 20454432680064. Its totient is φ = 19548752691600.

The previous prime is 20001012120977. The next prime is 20001012121037. The reversal of 20001012121001 is 10012121010002.

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 20001012121001 - 2²⁶ = 20000945012137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001012124001) by changing a digit.

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, 290247575 + ... + 290316476.

It is an arithmetic number, because the mean of its divisors is an integer number (2556804085008).

Almost surely, 2^{20001012121001} is an apocalyptic number.

It is an amenable number.

20001012121001 is a deficient number, since it is larger than the sum of its proper divisors (453420559063).

20001012121001 is an equidigital number, since it uses as much as digits as its factorization.

20001012121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580564831.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20001012121001 its reverse (10012121010002), we get a palindrome (30013133131003).

The spelling of 20001012121001 in words is "twenty trillion, one billion, twelve million, one hundred twenty-one thousand, one".