121212322321 has 2 divisors, whose sum is σ = 121212322322. Its totient is φ = 121212322320.

The previous prime is 121212322237. The next prime is 121212322327. The reversal of 121212322321 is 123223212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103185500625 + 18026821696 = 321225^2 + 134264^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212322321 - 2²⁷ = 121078104593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121212322292 and 121212322301.

It is not a weakly prime, because it can be changed into another prime (121212322327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606161160 + 60606161161.

It is an arithmetic number, because the mean of its divisors is an integer number (60606161161).

Almost surely, 2^121212322321 is an apocalyptic number.

It is an amenable number.

121212322321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212322321 is an equidigital number, since it uses as much as digits as its factorization.

121212322321 is an evil number, because the sum of its binary digits is even.

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

Adding to 121212322321 its reverse (123223212121), we get a palindrome (244435534442).

The spelling of 121212322321 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred twenty-two thousand, three hundred twenty-one".