12212201202221 has 2 divisors, whose sum is σ = 12212201202222. Its totient is φ = 12212201202220.

The previous prime is 12212201202211. The next prime is 12212201202263. The reversal of 12212201202221 is 12220210221221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10508813392900 + 1703387809321 = 3241730^2 + 1305139^2 .

It is an emirp because it is prime and its reverse (12220210221221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12212201202221 - 2¹⁴ = 12212201185837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212201202193 and 12212201202202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212201202211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106100601110 + 6106100601111.

It is an arithmetic number, because the mean of its divisors is an integer number (6106100601111).

Almost surely, 2^{12212201202221} is an apocalyptic number.

It is an amenable number.

12212201202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212201202221 is an equidigital number, since it uses as much as digits as its factorization.

12212201202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12212201202221 its reverse (12220210221221), we get a palindrome (24432411423442).

The spelling of 12212201202221 in words is "twelve trillion, two hundred twelve billion, two hundred one million, two hundred two thousand, two hundred twenty-one".