20112133222021 has 4 divisors (see below), whose sum is σ = 20136630340044. Its totient is φ = 20087636104000.

The previous prime is 20112133221997. The next prime is 20112133222039. The reversal of 20112133222021 is 12022233121102.

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 13438720164996 + 6673413057025 = 3665886^2 + 2583295^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112133222021 - 2⁴¹ = 17913109966469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112133221983 and 20112133222001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112133222081) 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, 12248557780 + ... + 12248559421.

It is an arithmetic number, because the mean of its divisors is an integer number (5034157585011).

Almost surely, 2^{20112133222021} is an apocalyptic number.

It is an amenable number.

20112133222021 is a deficient number, since it is larger than the sum of its proper divisors (24497118023).

20112133222021 is an equidigital number, since it uses as much as digits as its factorization.

20112133222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24497118022.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 20112133222021 its reverse (12022233121102), we get a palindrome (32134366343123).

The spelling of 20112133222021 in words is "twenty trillion, one hundred twelve billion, one hundred thirty-three million, two hundred twenty-two thousand, twenty-one".