1220300312221 has 2 divisors, whose sum is σ = 1220300312222. Its totient is φ = 1220300312220.

The previous prime is 1220300312183. The next prime is 1220300312239. The reversal of 1220300312221 is 1222130030221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218981605625 + 1318706596 = 1104075^2 + 36314^2 .

It is an emirp because it is prime and its reverse (1222130030221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220300312221 - 2¹⁵ = 1220300279453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220300319221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610150156110 + 610150156111.

It is an arithmetic number, because the mean of its divisors is an integer number (610150156111).

Almost surely, 2^{1220300312221} is an apocalyptic number.

It is an amenable number.

1220300312221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220300312221 is an equidigital number, since it uses as much as digits as its factorization.

1220300312221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1220300312221 its reverse (1222130030221), we get a palindrome (2442430342442).

The spelling of 1220300312221 in words is "one trillion, two hundred twenty billion, three hundred million, three hundred twelve thousand, two hundred twenty-one".