12221753800 has 96 divisors (see below), whose sum is σ = 31211841600. Its totient is φ = 4430004480.

The previous prime is 12221753783. The next prime is 12221753809. The reversal of 12221753800 is 835712221.

It is not an unprimeable number, because it can be changed into a prime (12221753809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17482 + ... + 157318.

It is an arithmetic number, because the mean of its divisors is an integer number (325123350).

Almost surely, 2^12221753800 is an apocalyptic number.

12221753800 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 12221753800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15605920800).

12221753800 is an abundant number, since it is smaller than the sum of its proper divisors (18990087800).

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

12221753800 is a wasteful number, since it uses less digits than its factorization.

12221753800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139895 (or 139886 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The spelling of 12221753800 in words is "twelve billion, two hundred twenty-one million, seven hundred fifty-three thousand, eight hundred".