121310103020321 has 2 divisors, whose sum is σ = 121310103020322. Its totient is φ = 121310103020320.

The previous prime is 121310103020311. The next prime is 121310103020429. The reversal of 121310103020321 is 123020301013121.

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., 65732123776225 + 55577979244096 = 8107535^2 + 7455064^2 .

It is an emirp because it is prime and its reverse (123020301013121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121310103020321 - 2¹⁸ = 121310102758177 is a prime.

It is a super-2 number, since 2×121310103020321² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121310103020293 and 121310103020302.

It is not a weakly prime, because it can be changed into another prime (121310103020311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655051510160 + 60655051510161.

It is an arithmetic number, because the mean of its divisors is an integer number (60655051510161).

Almost surely, 2^{121310103020321} is an apocalyptic number.

It is an amenable number.

121310103020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121310103020321 is an equidigital number, since it uses as much as digits as its factorization.

121310103020321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121310103020321 its reverse (123020301013121), we get a palindrome (244330404033442).

The spelling of 121310103020321 in words is "one hundred twenty-one trillion, three hundred ten billion, one hundred three million, twenty thousand, three hundred twenty-one".