21110221320230 has 24 divisors (see below), whose sum is σ = 44202218520528. Its totient is φ = 7237790166768.

The previous prime is 21110221320203. The next prime is 21110221320241. The reversal of 21110221320230 is 3202312201112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21541041674 + ... + 21541042653.

It is an arithmetic number, because the mean of its divisors is an integer number (1841759105022).

Almost surely, 2^{21110221320230} is an apocalyptic number.

21110221320230 is an abundant number, since it is smaller than the sum of its proper divisors (23091997200298).

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

21110221320230 is a wasteful number, since it uses less digits than its factorization.

21110221320230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43082084348 (or 43082084341 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21110221320230 its reverse (3202312201112), we get a palindrome (24312533521342).

The spelling of 21110221320230 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-one million, three hundred twenty thousand, two hundred thirty".