21220203301230 has 64 divisors (see below), whose sum is σ = 51615328757760. Its totient is φ = 5582522390016.

The previous prime is 21220203301229. The next prime is 21220203301243. The reversal of 21220203301230 is 3210330202212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21220203301197 and 21220203301206.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 762027 + ... + 6559046.

It is an arithmetic number, because the mean of its divisors is an integer number (806489511840).

Almost surely, 2^{21220203301230} is an apocalyptic number.

21220203301230 is an abundant number, since it is smaller than the sum of its proper divisors (30395125456530).

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

21220203301230 is a wasteful number, since it uses less digits than its factorization.

21220203301230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322385.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21220203301230 its reverse (3210330202212), we get a palindrome (24430533503442).

The spelling of 21220203301230 in words is "twenty-one trillion, two hundred twenty billion, two hundred three million, three hundred one thousand, two hundred thirty".