12134012856 has 32 divisors (see below), whose sum is σ = 34668608640. Its totient is φ = 3466860768.

The previous prime is 12134012843. The next prime is 12134012857. The reversal of 12134012856 is 65821043121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12134012857) 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, 36112966 + ... + 36113301.

It is an arithmetic number, because the mean of its divisors is an integer number (1083394020).

Almost surely, 2^12134012856 is an apocalyptic number.

It is an amenable number.

12134012856 is an abundant number, since it is smaller than the sum of its proper divisors (22534595784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12134012856 is a wasteful number, since it uses less digits than its factorization.

12134012856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72226283 (or 72226279 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

Adding to 12134012856 its reverse (65821043121), we get a palindrome (77955055977).

The spelling of 12134012856 in words is "twelve billion, one hundred thirty-four million, twelve thousand, eight hundred fifty-six".