221101102200221 has 2 divisors, whose sum is σ = 221101102200222. Its totient is φ = 221101102200220.

The previous prime is 221101102200211. The next prime is 221101102200229. The reversal of 221101102200221 is 122002201101122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209999804476900 + 11101297723321 = 14491370^2 + 3331861^2 .

It is a cyclic number.

It is not a de Polignac number, because 221101102200221 - 2⁶ = 221101102200157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221101102200221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221101102200229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550551100110 + 110550551100111.

It is an arithmetic number, because the mean of its divisors is an integer number (110550551100111).

Almost surely, 2^{221101102200221} is an apocalyptic number.

It is an amenable number.

221101102200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

221101102200221 is an equidigital number, since it uses as much as digits as its factorization.

221101102200221 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 221101102200221 its reverse (122002201101122), we get a palindrome (343103303301343).

The spelling of 221101102200221 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred two million, two hundred thousand, two hundred twenty-one".