121230512369 has 2 divisors, whose sum is σ = 121230512370. Its totient is φ = 121230512368.

The previous prime is 121230512317. The next prime is 121230512371. The reversal of 121230512369 is 963215032121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100527043600 + 20703468769 = 317060^2 + 143887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121230512369 is a prime.

It is a super-2 number, since 2×121230512369² (a number of 23 digits) contains 22 as substring.

Together with 121230512371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121230512069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60615256184 + 60615256185.

It is an arithmetic number, because the mean of its divisors is an integer number (60615256185).

Almost surely, 2^121230512369 is an apocalyptic number.

It is an amenable number.

121230512369 is a deficient number, since it is larger than the sum of its proper divisors (1).

121230512369 is an equidigital number, since it uses as much as digits as its factorization.

121230512369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 121230512369 in words is "one hundred twenty-one billion, two hundred thirty million, five hundred twelve thousand, three hundred sixty-nine".