12202101122221 has 2 divisors, whose sum is σ = 12202101122222. Its totient is φ = 12202101122220.

The previous prime is 12202101122219. The next prime is 12202101122287. The reversal of 12202101122221 is 12222110120221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11678547577321 + 523553544900 = 3417389^2 + 723570^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202101122221 - 2¹ = 12202101122219 is a prime.

Together with 12202101122219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12202101128221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101050561110 + 6101050561111.

It is an arithmetic number, because the mean of its divisors is an integer number (6101050561111).

Almost surely, 2^{12202101122221} is an apocalyptic number.

It is an amenable number.

12202101122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12202101122221 is an equidigital number, since it uses as much as digits as its factorization.

12202101122221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12202101122221 its reverse (12222110120221), we get a palindrome (24424211242442).

The spelling of 12202101122221 in words is "twelve trillion, two hundred two billion, one hundred one million, one hundred twenty-two thousand, two hundred twenty-one".