121111120321 has 2 divisors, whose sum is σ = 121111120322. Its totient is φ = 121111120320.

The previous prime is 121111120301. The next prime is 121111120331. The reversal of 121111120321 is 123021111121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102077055025 + 19034065296 = 319495^2 + 137964^2 .

It is an emirp because it is prime and its reverse (123021111121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121111120321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121111120295 and 121111120304.

It is not a weakly prime, because it can be changed into another prime (121111120301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555560160 + 60555560161.

It is an arithmetic number, because the mean of its divisors is an integer number (60555560161).

Almost surely, 2^121111120321 is an apocalyptic number.

It is an amenable number.

121111120321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111120321 is an equidigital number, since it uses as much as digits as its factorization.

121111120321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 121111120321 its reverse (123021111121), we get a palindrome (244132231442).

The spelling of 121111120321 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred twenty thousand, three hundred twenty-one".