21202223443400 has 192 divisors, whose sum is σ = 51174650862720. Its totient is φ = 8163374284800.

The previous prime is 21202223443397. The next prime is 21202223443403. The reversal of 21202223443400 is 434432220212.

It is an interprime number because it is at equal distance from previous prime (21202223443397) and next prime (21202223443403).

It is not an unprimeable number, because it can be changed into a prime (21202223443403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1680975494 + ... + 1680988106.

It is an arithmetic number, because the mean of its divisors is an integer number (266534639910).

Almost surely, 2^{21202223443400} is an apocalyptic number.

21202223443400 is a gapful number since it is divisible by the number (20) 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 21202223443400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25587325431360).

21202223443400 is an abundant number, since it is smaller than the sum of its proper divisors (29972427419320).

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

21202223443400 is a wasteful number, since it uses less digits than its factorization.

21202223443400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15496 (or 15487 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21202223443400 its reverse (434432220212), we get a palindrome (21636655663612).

The spelling of 21202223443400 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-three million, four hundred forty-three thousand, four hundred".