21224032520230 has 128 divisors (see below), whose sum is σ = 44555126353920. Its totient is φ = 7225150648320.

The previous prime is 21224032520221. The next prime is 21224032520233. The reversal of 21224032520230 is 3202523042212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224032520233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5857677 + ... + 8761303.

It is an arithmetic number, because the mean of its divisors is an integer number (348086924640).

Almost surely, 2^{21224032520230} is an apocalyptic number.

21224032520230 is an abundant number, since it is smaller than the sum of its proper divisors (23331093833690).

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

21224032520230 is a wasteful number, since it uses less digits than its factorization.

21224032520230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2903774.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 21224032520230 its reverse (3202523042212), we get a palindrome (24426555562442).

The spelling of 21224032520230 in words is "twenty-one trillion, two hundred twenty-four billion, thirty-two million, five hundred twenty thousand, two hundred thirty".