12321166156253 has 4 divisors (see below), whose sum is σ = 12434204377980. Its totient is φ = 12208127934528.

The previous prime is 12321166156237. The next prime is 12321166156283. The reversal of 12321166156253 is 35265166112321.

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 2 ways, for example, as 7770167400004 + 4550998756249 = 2787502^2 + 2133307^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321166156253 - 2⁴ = 12321166156237 is a prime.

It is a super-2 number, since 2×12321166156253² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321166156283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56519110700 + ... + 56519110917.

It is an arithmetic number, because the mean of its divisors is an integer number (3108551094495).

Almost surely, 2^{12321166156253} is an apocalyptic number.

It is an amenable number.

12321166156253 is a deficient number, since it is larger than the sum of its proper divisors (113038221727).

12321166156253 is a wasteful number, since it uses less digits than its factorization.

12321166156253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113038221726.

The product of its digits is 388800, while the sum is 44.

The spelling of 12321166156253 in words is "twelve trillion, three hundred twenty-one billion, one hundred sixty-six million, one hundred fifty-six thousand, two hundred fifty-three".