12210312121523 has 2 divisors, whose sum is σ = 12210312121524. Its totient is φ = 12210312121522.

The previous prime is 12210312121507. The next prime is 12210312121531. The reversal of 12210312121523 is 32512121301221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12210312121523 - 2⁴ = 12210312121507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210312121492 and 12210312121501.

It is not a weakly prime, because it can be changed into another prime (12210312151523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105156060761 + 6105156060762.

It is an arithmetic number, because the mean of its divisors is an integer number (6105156060762).

Almost surely, 2^{12210312121523} is an apocalyptic number.

12210312121523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12210312121523 is an equidigital number, since it uses as much as digits as its factorization.

12210312121523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 12210312121523 its reverse (32512121301221), we get a palindrome (44722433422744).

The spelling of 12210312121523 in words is "twelve trillion, two hundred ten billion, three hundred twelve million, one hundred twenty-one thousand, five hundred twenty-three".