12211505320 has 32 divisors (see below), whose sum is σ = 31401014400. Its totient is φ = 4186801728.

The previous prime is 12211505311. The next prime is 12211505359. The reversal of 12211505320 is 2350511221.

It is a junction number, because it is equal to n+sod(n) for n = 12211505291 and 12211505300.

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, 21805980 + ... + 21806539.

It is an arithmetic number, because the mean of its divisors is an integer number (981281700).

Almost surely, 2^12211505320 is an apocalyptic number.

12211505320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211505320 is an abundant number, since it is smaller than the sum of its proper divisors (19189509080).

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

12211505320 is a wasteful number, since it uses less digits than its factorization.

12211505320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43612537 (or 43612533 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 12211505320 in words is "twelve billion, two hundred eleven million, five hundred five thousand, three hundred twenty".