1020320221201 has 2 divisors, whose sum is σ = 1020320221202. Its totient is φ = 1020320221200.

The previous prime is 1020320221177. The next prime is 1020320221229. The reversal of 1020320221201 is 1021220230201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1008720931201 + 11599290000 = 1004351^2 + 107700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020320221201 - 2⁵ = 1020320221169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020320221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510160110600 + 510160110601.

It is an arithmetic number, because the mean of its divisors is an integer number (510160110601).

Almost surely, 2^{1020320221201} is an apocalyptic number.

It is an amenable number.

1020320221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020320221201 is an equidigital number, since it uses as much as digits as its factorization.

1020320221201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1020320221201 its reverse (1021220230201), we get a palindrome (2041540451402).

The spelling of 1020320221201 in words is "one trillion, twenty billion, three hundred twenty million, two hundred twenty-one thousand, two hundred one".