222102200201221 has 2 divisors, whose sum is σ = 222102200201222. Its totient is φ = 222102200201220.

The previous prime is 222102200201197. The next prime is 222102200201279. The reversal of 222102200201221 is 122102002201222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189905211972100 + 32196988229121 = 13780610^2 + 5674239^2 .

It is a cyclic number.

It is not a de Polignac number, because 222102200201221 - 2¹⁹ = 222102199676933 is a prime.

It is a super-2 number, since 2×222102200201221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222102200204221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111051100100610 + 111051100100611.

It is an arithmetic number, because the mean of its divisors is an integer number (111051100100611).

Almost surely, 2^{222102200201221} is an apocalyptic number.

It is an amenable number.

222102200201221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222102200201221 is an equidigital number, since it uses as much as digits as its factorization.

222102200201221 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 19.

Adding to 222102200201221 its reverse (122102002201222), we get a palindrome (344204202402443).

The spelling of 222102200201221 in words is "two hundred twenty-two trillion, one hundred two billion, two hundred million, two hundred one thousand, two hundred twenty-one".