12206511056 has 20 divisors (see below), whose sum is σ = 24678381792. Its totient is φ = 5837896416.

The previous prime is 12206511049. The next prime is 12206511059. The reversal of 12206511056 is 65011560221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12206511059) 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, 16584566 + ... + 16585301.

Almost surely, 2^12206511056 is an apocalyptic number.

12206511056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12206511056 is an abundant number, since it is smaller than the sum of its proper divisors (12471870736).

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

12206511056 is a wasteful number, since it uses less digits than its factorization.

12206511056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33169898 (or 33169892 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 12206511056 in words is "twelve billion, two hundred six million, five hundred eleven thousand, fifty-six".