12533405421165 has 16 divisors (see below), whose sum is σ = 20060216699328. Its totient is φ = 6682226882816.

The previous prime is 12533405421067. The next prime is 12533405421167. The reversal of 12533405421165 is 56112450433521.

It is a cyclic number.

It is not a de Polignac number, because 12533405421165 - 2⁷ = 12533405421037 is a prime.

It is a super-2 number, since 2×12533405421165² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12533405421167) 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 in 15 ways as a sum of consecutive naturals, for example, 140954604 + ... + 141043493.

It is an arithmetic number, because the mean of its divisors is an integer number (1253763543708).

Almost surely, 2^{12533405421165} is an apocalyptic number.

12533405421165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12533405421165 is a deficient number, since it is larger than the sum of its proper divisors (7526811278163).

12533405421165 is a wasteful number, since it uses less digits than its factorization.

12533405421165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282001068.

The product of its (nonzero) digits is 432000, while the sum is 42.

Adding to 12533405421165 its reverse (56112450433521), we get a palindrome (68645855854686).

The spelling of 12533405421165 in words is "twelve trillion, five hundred thirty-three billion, four hundred five million, four hundred twenty-one thousand, one hundred sixty-five".