12212100211021 has 2 divisors, whose sum is σ = 12212100211022. Its totient is φ = 12212100211020.

The previous prime is 12212100211019. The next prime is 12212100211037. The reversal of 12212100211021 is 12011200121221.

12212100211021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12212100211037) can be obtained adding 12212100211021 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6591696804900 + 5620403406121 = 2567430^2 + 2370739^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212100211021 - 2¹ = 12212100211019 is a prime.

Together with 12212100211019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12212100210986 and 12212100211004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212100211081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106050105510 + 6106050105511.

It is an arithmetic number, because the mean of its divisors is an integer number (6106050105511).

Almost surely, 2^{12212100211021} is an apocalyptic number.

It is an amenable number.

12212100211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212100211021 is an equidigital number, since it uses as much as digits as its factorization.

12212100211021 is an evil number, because the sum of its binary digits is even.

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

Adding to 12212100211021 its reverse (12011200121221), we get a palindrome (24223300332242).

The spelling of 12212100211021 in words is "twelve trillion, two hundred twelve billion, one hundred million, two hundred eleven thousand, twenty-one".