21225441000243 has 8 divisors (see below), whose sum is σ = 29790092632000. Its totient is φ = 13405541684328.

The previous prime is 21225441000227. The next prime is 21225441000259. The reversal of 21225441000243 is 34200014452212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21225441000227) and next prime (21225441000259).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21225441000243 - 2⁴ = 21225441000227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21225441000243.

It is not an unprimeable number, because it can be changed into a prime (21225441000943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186188078893 + ... + 186188079006.

It is an arithmetic number, because the mean of its divisors is an integer number (3723761579000).

Almost surely, 2^{21225441000243} is an apocalyptic number.

21225441000243 is a deficient number, since it is larger than the sum of its proper divisors (8564651631757).

21225441000243 is a wasteful number, since it uses less digits than its factorization.

21225441000243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372376157921.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21225441000243 its reverse (34200014452212), we get a palindrome (55425455452455).

The spelling of 21225441000243 in words is "twenty-one trillion, two hundred twenty-five billion, four hundred forty-one million, two hundred forty-three", and thus it is an aban number.