1320020122121 has 2 divisors, whose sum is σ = 1320020122122. Its totient is φ = 1320020122120.

The previous prime is 1320020122087. The next prime is 1320020122133. The reversal of 1320020122121 is 1212210200231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1214979312121 + 105040810000 = 1102261^2 + 324100^2 .

It is an emirp because it is prime and its reverse (1212210200231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1320020122121 - 2³⁴ = 1302840252937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1320020122121.

It is not a weakly prime, because it can be changed into another prime (1320020122621) 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, 660010061060 + 660010061061.

It is an arithmetic number, because the mean of its divisors is an integer number (660010061061).

Almost surely, 2^{1320020122121} is an apocalyptic number.

It is an amenable number.

1320020122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320020122121 is an equidigital number, since it uses as much as digits as its factorization.

1320020122121 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 17.

Adding to 1320020122121 its reverse (1212210200231), we get a palindrome (2532230322352).

The spelling of 1320020122121 in words is "one trillion, three hundred twenty billion, twenty million, one hundred twenty-two thousand, one hundred twenty-one".