12213064500 has 384 divisors, whose sum is σ = 44170334208. Its totient is φ = 2553408000.

The previous prime is 12213064471. The next prime is 12213064529. The reversal of 12213064500 is 546031221.

It is an interprime number because it is at equal distance from previous prime (12213064471) and next prime (12213064529).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17881159 + ... + 17881841.

It is an arithmetic number, because the mean of its divisors is an integer number (115026912).

Almost surely, 2^12213064500 is an apocalyptic number.

12213064500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12213064500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22085167104).

12213064500 is an abundant number, since it is smaller than the sum of its proper divisors (31957269708).

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

12213064500 is a wasteful number, since it uses less digits than its factorization.

12213064500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12213064500 its reverse (546031221), we get a palindrome (12759095721).

The spelling of 12213064500 in words is "twelve billion, two hundred thirteen million, sixty-four thousand, five hundred".