12211006021 has 2 divisors, whose sum is σ = 12211006022. Its totient is φ = 12211006020.

The previous prime is 12211005997. The next prime is 12211006039. The reversal of 12211006021 is 12060011221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12037161796 + 173844225 = 109714^2 + 13185^2 .

It is an emirp because it is prime and its reverse (12060011221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12211006021 - 2³³ = 3621071429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12211005986 and 12211006004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12211006091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105503010 + 6105503011.

It is an arithmetic number, because the mean of its divisors is an integer number (6105503011).

Almost surely, 2^12211006021 is an apocalyptic number.

It is an amenable number.

12211006021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211006021 is an equidigital number, since it uses as much as digits as its factorization.

12211006021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12211006021 its reverse (12060011221), we get a palindrome (24271017242).

The spelling of 12211006021 in words is "twelve billion, two hundred eleven million, six thousand, twenty-one".