12212713021 has 2 divisors, whose sum is σ = 12212713022. Its totient is φ = 12212713020.

The previous prime is 12212712959. The next prime is 12212713039. The reversal of 12212713021 is 12031721221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12097580121 + 115132900 = 109989^2 + 10730^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212713021 - 2¹¹ = 12212710973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212712983 and 12212713001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212713061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106356510 + 6106356511.

It is an arithmetic number, because the mean of its divisors is an integer number (6106356511).

Almost surely, 2^12212713021 is an apocalyptic number.

It is an amenable number.

12212713021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212713021 is an equidigital number, since it uses as much as digits as its factorization.

12212713021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The spelling of 12212713021 in words is "twelve billion, two hundred twelve million, seven hundred thirteen thousand, twenty-one".