12223217500 has 60 divisors (see below), whose sum is σ = 28785941800. Its totient is φ = 4513176000.

The previous prime is 12223217477. The next prime is 12223217507. The reversal of 12223217500 is 571232221.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12223217507) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 155550 + ... + 220549.

Almost surely, 2^12223217500 is an apocalyptic number.

12223217500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12223217500 is an abundant number, since it is smaller than the sum of its proper divisors (16562724300).

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

12223217500 is a wasteful number, since it uses less digits than its factorization.

12223217500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376136 (or 376119 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 12223217500 its reverse (571232221), we get a palindrome (12794449721).

The spelling of 12223217500 in words is "twelve billion, two hundred twenty-three million, two hundred seventeen thousand, five hundred".