22201222100221 has 2 divisors, whose sum is σ = 22201222100222. Its totient is φ = 22201222100220.

The previous prime is 22201222100209. The next prime is 22201222100249. The reversal of 22201222100221 is 12200122210222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13646263987225 + 8554958112996 = 3694085^2 + 2924886^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201222100221 - 2²¹ = 22201220003069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201222106221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100611050110 + 11100611050111.

It is an arithmetic number, because the mean of its divisors is an integer number (11100611050111).

Almost surely, 2^{22201222100221} is an apocalyptic number.

It is an amenable number.

22201222100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201222100221 is an equidigital number, since it uses as much as digits as its factorization.

22201222100221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22201222100221 its reverse (12200122210222), we get a palindrome (34401344310443).

The spelling of 22201222100221 in words is "twenty-two trillion, two hundred one billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-one".