12656145203 has 4 divisors (see below), whose sum is σ = 13629694848. Its totient is φ = 11682595560.

The previous prime is 12656145197. The next prime is 12656145211. The reversal of 12656145203 is 30254165621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30254165621 = 43 ⋅703585247.

It is a cyclic number.

It is not a de Polignac number, because 12656145203 - 2¹⁴ = 12656128819 is a prime.

It is a super-2 number, since 2×12656145203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12656141203) 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, 486774803 + ... + 486774828.

It is an arithmetic number, because the mean of its divisors is an integer number (3407423712).

Almost surely, 2^12656145203 is an apocalyptic number.

12656145203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12656145203 is a deficient number, since it is larger than the sum of its proper divisors (973549645).

12656145203 is an equidigital number, since it uses as much as digits as its factorization.

12656145203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973549644.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12656145203 in words is "twelve billion, six hundred fifty-six million, one hundred forty-five thousand, two hundred three".