12202211001221 has 2 divisors, whose sum is σ = 12202211001222. Its totient is φ = 12202211001220.

The previous prime is 12202211001131. The next prime is 12202211001251. The reversal of 12202211001221 is 12210011220221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11933639340100 + 268571661121 = 3454510^2 + 518239^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202211001221 - 2²⁶ = 12202143892357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12202211001221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12202211001251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101105500610 + 6101105500611.

It is an arithmetic number, because the mean of its divisors is an integer number (6101105500611).

Almost surely, 2^{12202211001221} is an apocalyptic number.

It is an amenable number.

12202211001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12202211001221 is an equidigital number, since it uses as much as digits as its factorization.

12202211001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12202211001221 its reverse (12210011220221), we get a palindrome (24412222221442).

The spelling of 12202211001221 in words is "twelve trillion, two hundred two billion, two hundred eleven million, one thousand, two hundred twenty-one".