1302221232121 has 2 divisors, whose sum is σ = 1302221232122. Its totient is φ = 1302221232120.

The previous prime is 1302221232043. The next prime is 1302221232139. The reversal of 1302221232121 is 1212321222031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856478062521 + 445743169600 = 925461^2 + 667640^2 .

It is an emirp because it is prime and its reverse (1212321222031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1302221232121 - 2¹⁹ = 1302220707833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1302221232092 and 1302221232101.

It is not a weakly prime, because it can be changed into another prime (1302221232181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651110616060 + 651110616061.

It is an arithmetic number, because the mean of its divisors is an integer number (651110616061).

Almost surely, 2^{1302221232121} is an apocalyptic number.

It is an amenable number.

1302221232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302221232121 is an equidigital number, since it uses as much as digits as its factorization.

1302221232121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1302221232121 its reverse (1212321222031), we get a palindrome (2514542454152).

The spelling of 1302221232121 in words is "one trillion, three hundred two billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred twenty-one".