12261662012356 has 24 divisors (see below), whose sum is σ = 21752271968504. Its totient is φ = 6046730403840.

The previous prime is 12261662012297. The next prime is 12261662012359. The reversal of 12261662012356 is 65321026616221.

It can be written as a sum of positive squares in 4 ways, for example, as 5900118728256 + 6361543284100 = 2429016^2 + 2522210^2 .

It is not an unprimeable number, because it can be changed into a prime (12261662012359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15881776 + ... + 16635928.

Almost surely, 2^{12261662012356} is an apocalyptic number.

It is an amenable number.

12261662012356 is a deficient number, since it is larger than the sum of its proper divisors (9490609956148).

12261662012356 is a wasteful number, since it uses less digits than its factorization.

12261662012356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809911 (or 809909 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

Adding to 12261662012356 its reverse (65321026616221), we get a palindrome (77582688628577).

The spelling of 12261662012356 in words is "twelve trillion, two hundred sixty-one billion, six hundred sixty-two million, twelve thousand, three hundred fifty-six".