12130221400 has 96 divisors (see below), whose sum is σ = 30939537600. Its totient is φ = 4386204800.

The previous prime is 12130221373. The next prime is 12130221409. The reversal of 12130221400 is 412203121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12130221409) 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, 378399 + ... + 409201.

It is an arithmetic number, because the mean of its divisors is an integer number (322286850).

Almost surely, 2^12130221400 is an apocalyptic number.

12130221400 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 12130221400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15469768800).

12130221400 is an abundant number, since it is smaller than the sum of its proper divisors (18809316200).

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

12130221400 is a wasteful number, since it uses less digits than its factorization.

12130221400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31009 (or 31000 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12130221400 its reverse (412203121), we get a palindrome (12542424521).

The spelling of 12130221400 in words is "twelve billion, one hundred thirty million, two hundred twenty-one thousand, four hundred".