1220223001321 has 2 divisors, whose sum is σ = 1220223001322. Its totient is φ = 1220223001320.

The previous prime is 1220223001303. The next prime is 1220223001339. The reversal of 1220223001321 is 1231003220221.

It is a balanced prime because it is at equal distance from previous prime (1220223001303) and next prime (1220223001339).

It can be written as a sum of positive squares in only one way, i.e., 1218736513296 + 1486488025 = 1103964^2 + 38555^2 .

It is an emirp because it is prime and its reverse (1231003220221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220223001321 - 2¹¹ = 1220222999273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220223001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610111500660 + 610111500661.

It is an arithmetic number, because the mean of its divisors is an integer number (610111500661).

Almost surely, 2^{1220223001321} is an apocalyptic number.

It is an amenable number.

1220223001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220223001321 is an equidigital number, since it uses as much as digits as its factorization.

1220223001321 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1220223001321 its reverse (1231003220221), we get a palindrome (2451226221542).

The spelling of 1220223001321 in words is "one trillion, two hundred twenty billion, two hundred twenty-three million, one thousand, three hundred twenty-one".