1220544420331 has 2 divisors, whose sum is σ = 1220544420332. Its totient is φ = 1220544420330.

The previous prime is 1220544420317. The next prime is 1220544420383. The reversal of 1220544420331 is 1330244450221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220544420331 - 2⁷ = 1220544420203 is a prime.

It is a super-2 number, since 2×1220544420331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220544420293 and 1220544420302.

It is not a weakly prime, because it can be changed into another prime (1220544420391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610272210165 + 610272210166.

It is an arithmetic number, because the mean of its divisors is an integer number (610272210166).

Almost surely, 2^{1220544420331} is an apocalyptic number.

1220544420331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220544420331 is an equidigital number, since it uses as much as digits as its factorization.

1220544420331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 1220544420331 its reverse (1330244450221), we get a palindrome (2550788870552).

The spelling of 1220544420331 in words is "one trillion, two hundred twenty billion, five hundred forty-four million, four hundred twenty thousand, three hundred thirty-one".