12267017521426 has 4 divisors (see below), whose sum is σ = 18400526282142. Its totient is φ = 6133508760712.

The previous prime is 12267017521411. The next prime is 12267017521427. The reversal of 12267017521426 is 62412571076221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11740210107201 + 526807414225 = 3426399^2 + 725815^2 .

It is not an unprimeable number, because it can be changed into a prime (12267017521427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3066754380355 + ... + 3066754380358.

Almost surely, 2^{12267017521426} is an apocalyptic number.

12267017521426 is a deficient number, since it is larger than the sum of its proper divisors (6133508760716).

12267017521426 is an equidigital number, since it uses as much as digits as its factorization.

12267017521426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6133508760715.

The product of its (nonzero) digits is 564480, while the sum is 46.

Adding to 12267017521426 its reverse (62412571076221), we get a palindrome (74679588597647).

The spelling of 12267017521426 in words is "twelve trillion, two hundred sixty-seven billion, seventeen million, five hundred twenty-one thousand, four hundred twenty-six".