101221201110221 has 2 divisors, whose sum is σ = 101221201110222. Its totient is φ = 101221201110220.

The previous prime is 101221201110097. The next prime is 101221201110229. The reversal of 101221201110221 is 122011102122101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97594423662121 + 3626777448100 = 9878989^2 + 1904410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221201110221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101221201110221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101221201110229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610600555110 + 50610600555111.

It is an arithmetic number, because the mean of its divisors is an integer number (50610600555111).

Almost surely, 2^{101221201110221} is an apocalyptic number.

It is an amenable number.

101221201110221 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221201110221 is an equidigital number, since it uses as much as digits as its factorization.

101221201110221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 101221201110221 its reverse (122011102122101), we get a palindrome (223232303232322).

The spelling of 101221201110221 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred one million, one hundred ten thousand, two hundred twenty-one".