12211356520 has 64 divisors (see below), whose sum is σ = 30270205440. Its totient is φ = 4396512000.

The previous prime is 12211356503. The next prime is 12211356523. The reversal of 12211356520 is 2565311221.

It is not an unprimeable number, because it can be changed into a prime (12211356523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92952 + ... + 181831.

It is an arithmetic number, because the mean of its divisors is an integer number (472971960).

Almost surely, 2^12211356520 is an apocalyptic number.

12211356520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211356520 is an abundant number, since it is smaller than the sum of its proper divisors (18058848920).

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

12211356520 is a wasteful number, since it uses less digits than its factorization.

12211356520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274906 (or 274902 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 12211356520 its reverse (2565311221), we get a palindrome (14776667741).

The spelling of 12211356520 in words is "twelve billion, two hundred eleven million, three hundred fifty-six thousand, five hundred twenty".