221102200011221 has 2 divisors, whose sum is σ = 221102200011222. Its totient is φ = 221102200011220.

The previous prime is 221102200011197. The next prime is 221102200011241. The reversal of 221102200011221 is 122110002201122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202103498448721 + 18998701562500 = 14216311^2 + 4358750^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102200011221 - 2⁶ = 221102200011157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221102200011221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221102200011241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551100005610 + 110551100005611.

It is an arithmetic number, because the mean of its divisors is an integer number (110551100005611).

Almost surely, 2^{221102200011221} is an apocalyptic number.

It is an amenable number.

221102200011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102200011221 is an equidigital number, since it uses as much as digits as its factorization.

221102200011221 is an evil number, because the sum of its binary digits is even.

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

Adding to 221102200011221 its reverse (122110002201122), we get a palindrome (343212202212343).

The spelling of 221102200011221 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred million, eleven thousand, two hundred twenty-one".