12221403000 has 256 divisors, whose sum is σ = 39670525440. Its totient is φ = 3129984000.

The previous prime is 12221402987. The next prime is 12221403023. The reversal of 12221403000 is 30412221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8240259 + ... + 8241741.

It is an arithmetic number, because the mean of its divisors is an integer number (154962990).

Almost surely, 2^12221403000 is an apocalyptic number.

12221403000 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 12221403000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19835262720).

12221403000 is an abundant number, since it is smaller than the sum of its proper divisors (27449122440).

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

12221403000 is a wasteful number, since it uses less digits than its factorization.

12221403000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615 (or 1601 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12221403000 its reverse (30412221), we get a palindrome (12251815221).

The spelling of 12221403000 in words is "twelve billion, two hundred twenty-one million, four hundred three thousand".