1222101000221 has 2 divisors, whose sum is σ = 1222101000222. Its totient is φ = 1222101000220.

The previous prime is 1222101000191. The next prime is 1222101000233. The reversal of 1222101000221 is 1220001012221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618014527321 + 604086472900 = 786139^2 + 777230^2 .

It is an emirp because it is prime and its reverse (1220001012221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222101000221 - 2³⁰ = 1221027258397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222101000196 and 1222101000205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222101300221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611050500110 + 611050500111.

It is an arithmetic number, because the mean of its divisors is an integer number (611050500111).

Almost surely, 2^{1222101000221} is an apocalyptic number.

It is an amenable number.

1222101000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222101000221 is an equidigital number, since it uses as much as digits as its factorization.

1222101000221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1222101000221 its reverse (1220001012221), we get a palindrome (2442102012442).

The spelling of 1222101000221 in words is "one trillion, two hundred twenty-two billion, one hundred one million, two hundred twenty-one", and thus it is an aban number.