121003312321 has 2 divisors, whose sum is σ = 121003312322. Its totient is φ = 121003312320.

The previous prime is 121003312303. The next prime is 121003312327. The reversal of 121003312321 is 123213300121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89347785921 + 31655526400 = 298911^2 + 177920^2 .

It is a cyclic number.

It is not a de Polignac number, because 121003312321 - 2²⁵ = 120969757889 is a prime.

It is not a weakly prime, because it can be changed into another prime (121003312327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501656160 + 60501656161.

It is an arithmetic number, because the mean of its divisors is an integer number (60501656161).

Almost surely, 2^121003312321 is an apocalyptic number.

It is an amenable number.

121003312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121003312321 is an equidigital number, since it uses as much as digits as its factorization.

121003312321 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 19.

Adding to 121003312321 its reverse (123213300121), we get a palindrome (244216612442).

The spelling of 121003312321 in words is "one hundred twenty-one billion, three million, three hundred twelve thousand, three hundred twenty-one".