20001010000121 has 4 divisors (see below), whose sum is σ = 20012458776912. Its totient is φ = 19989561223332.

The previous prime is 20001010000009. The next prime is 20001010000141. The reversal of 20001010000121 is 12100001010002.

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 20001010000121 - 2³⁰ = 19999936258297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001010000099 and 20001010000108.

It is not an unprimeable number, because it can be changed into a prime (20001010000141) 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, 5724385775 + ... + 5724389268.

It is an arithmetic number, because the mean of its divisors is an integer number (5003114694228).

Almost surely, 2^{20001010000121} is an apocalyptic number.

It is an amenable number.

20001010000121 is a deficient number, since it is larger than the sum of its proper divisors (11448776791).

20001010000121 is a wasteful number, since it uses less digits than its factorization.

20001010000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11448776790.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20001010000121 its reverse (12100001010002), we get a palindrome (32101011010123).

The spelling of 20001010000121 in words is "twenty trillion, one billion, ten million, one hundred twenty-one", and thus it is an aban number.