12205255220 has 24 divisors (see below), whose sum is σ = 25637740800. Its totient is φ = 4880824992.

The previous prime is 12205255217. The next prime is 12205255243. The reversal of 12205255220 is 2255250221.

It is a self number, because there is not a number n which added to its sum of digits gives 12205255220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521 + ... + 156239.

It is an arithmetic number, because the mean of its divisors is an integer number (1068239200).

Almost surely, 2^12205255220 is an apocalyptic number.

12205255220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12205255220 is an abundant number, since it is smaller than the sum of its proper divisors (13432485580).

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

12205255220 is a wasteful number, since it uses less digits than its factorization.

12205255220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159647 (or 159645 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 12205255220 in words is "twelve billion, two hundred five million, two hundred fifty-five thousand, two hundred twenty".