20012112201121 has 4 divisors (see below), whose sum is σ = 20169687887872. Its totient is φ = 19854536514372.

The previous prime is 20012112201089. The next prime is 20012112201131. The reversal of 20012112201121 is 12110221121002.

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 20012112201121 - 2⁵ = 20012112201089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012112201095 and 20012112201104.

It is not an unprimeable number, because it can be changed into a prime (20012112201131) 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 3 ways as a sum of consecutive naturals, for example, 78787843185 + ... + 78787843438.

It is an arithmetic number, because the mean of its divisors is an integer number (5042421971968).

Almost surely, 2^{20012112201121} is an apocalyptic number.

It is an amenable number.

20012112201121 is a deficient number, since it is larger than the sum of its proper divisors (157575686751).

20012112201121 is a wasteful number, since it uses less digits than its factorization.

20012112201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157575686750.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20012112201121 its reverse (12110221121002), we get a palindrome (32122333322123).

The spelling of 20012112201121 in words is "twenty trillion, twelve billion, one hundred twelve million, two hundred one thousand, one hundred twenty-one".