12225660500 has 96 divisors (see below), whose sum is σ = 29246948640. Its totient is φ = 4443801600.

The previous prime is 12225660487. The next prime is 12225660527. The reversal of 12225660500 is 506652221.

It can be written as a sum of positive squares in 16 ways, for example, as 9901842064 + 2323818436 = 99508^2 + 48206^2 .

It is a super-2 number, since 2×12225660500² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221702 + ... + 271298.

It is an arithmetic number, because the mean of its divisors is an integer number (304655715).

Almost surely, 2^12225660500 is an apocalyptic number.

12225660500 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 12225660500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14623474320).

12225660500 is an abundant number, since it is smaller than the sum of its proper divisors (17021288140).

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

12225660500 is a wasteful number, since it uses less digits than its factorization.

12225660500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49662 (or 49650 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The spelling of 12225660500 in words is "twelve billion, two hundred twenty-five million, six hundred sixty thousand, five hundred".