221210201201201 has 2 divisors, whose sum is σ = 221210201201202. Its totient is φ = 221210201201200.

The previous prime is 221210201201189. The next prime is 221210201201219. The reversal of 221210201201201 is 102102102012122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210810769416976 + 10399431784225 = 14519324^2 + 3224815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221210201201201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221210201201201.

It is not a weakly prime, because it can be changed into another prime (221210201206201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605100600600 + 110605100600601.

It is an arithmetic number, because the mean of its divisors is an integer number (110605100600601).

Almost surely, 2^{221210201201201} is an apocalyptic number.

It is an amenable number.

221210201201201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210201201201 is an equidigital number, since it uses as much as digits as its factorization.

221210201201201 is an odious number, because the sum of its binary digits is odd.

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

Adding to 221210201201201 its reverse (102102102012122), we get a palindrome (323312303213323).

The spelling of 221210201201201 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred one million, two hundred one thousand, two hundred one".