12215123146528 has 12 divisors (see below), whose sum is σ = 24048523694790. Its totient is φ = 6107561573248.

The previous prime is 12215123146517. The next prime is 12215123146561. The reversal of 12215123146528 is 82564132151221.

It can be written as a sum of positive squares in only one way, i.e., 7702778550544 + 4512344595984 = 2775388^2 + 2124228^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190861299133 + ... + 190861299196.

Almost surely, 2^{12215123146528} is an apocalyptic number.

It is an amenable number.

12215123146528 is a deficient number, since it is larger than the sum of its proper divisors (11833400548262).

12215123146528 is an equidigital number, since it uses as much as digits as its factorization.

12215123146528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381722598339 (or 381722598331 counting only the distinct ones).

The product of its digits is 230400, while the sum is 43.

Adding to 12215123146528 its reverse (82564132151221), we get a palindrome (94779255297749).

The spelling of 12215123146528 in words is "twelve trillion, two hundred fifteen billion, one hundred twenty-three million, one hundred forty-six thousand, five hundred twenty-eight".