21220202202330 has 64 divisors (see below), whose sum is σ = 50968744414848. Its totient is φ = 5654248104960.

The previous prime is 21220202202319. The next prime is 21220202202343. The reversal of 21220202202330 is 3320220202212.

It is a junction number, because it is equal to n+sod(n) for n = 21220202202297 and 21220202202306.

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, 752181925 + ... + 752210135.

It is an arithmetic number, because the mean of its divisors is an integer number (796386631482).

Almost surely, 2^{21220202202330} is an apocalyptic number.

21220202202330 is an abundant number, since it is smaller than the sum of its proper divisors (29748542212518).

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

21220202202330 is a wasteful number, since it uses less digits than its factorization.

21220202202330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47151.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21220202202330 its reverse (3320220202212), we get a palindrome (24540422404542).

The spelling of 21220202202330 in words is "twenty-one trillion, two hundred twenty billion, two hundred two million, two hundred two thousand, three hundred thirty".