12100122020221 has 4 divisors (see below), whose sum is σ = 12102267057244. Its totient is φ = 12097976983200.

The previous prime is 12100122020213. The next prime is 12100122020237. The reversal of 12100122020221 is 12202022100121.

It is a happy number.

12100122020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11930040012121 + 170082008100 = 3453989^2 + 412410^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100122020221 - 2³ = 12100122020213 is a prime.

It is a super-4 number, since 4×12100122020221⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100122020195 and 12100122020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100122023221) 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, 1072510050 + ... + 1072521331.

It is an arithmetic number, because the mean of its divisors is an integer number (3025566764311).

Almost surely, 2^{12100122020221} is an apocalyptic number.

It is an amenable number.

12100122020221 is a deficient number, since it is larger than the sum of its proper divisors (2145037023).

12100122020221 is an equidigital number, since it uses as much as digits as its factorization.

12100122020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145037022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12100122020221 its reverse (12202022100121), we get a palindrome (24302144120342).

The spelling of 12100122020221 in words is "twelve trillion, one hundred billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".