20112110212021 has 4 divisors (see below), whose sum is σ = 20112440233932. Its totient is φ = 20111780190112.

The previous prime is 20112110212001. The next prime is 20112110212031. The reversal of 20112110212021 is 12021201121102.

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 10565678739121 + 9546431472900 = 3250489^2 + 3089730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112110212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112110211986 and 20112110212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112110212001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164919526 + ... + 165041431.

It is an arithmetic number, because the mean of its divisors is an integer number (5028110058483).

Almost surely, 2^{20112110212021} is an apocalyptic number.

It is an amenable number.

20112110212021 is a deficient number, since it is larger than the sum of its proper divisors (330021911).

20112110212021 is an equidigital number, since it uses as much as digits as its factorization.

20112110212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330021910.

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

Adding to 20112110212021 its reverse (12021201121102), we get a palindrome (32133311333123).

It can be divided in two parts, 201121102 and 12021, that multiplied together give a palindrome (2417676767142).

The spelling of 20112110212021 in words is "twenty trillion, one hundred twelve billion, one hundred ten million, two hundred twelve thousand, twenty-one".