201221310330 has 48 divisors (see below), whose sum is σ = 523872221184. Its totient is φ = 53587548000.

The previous prime is 201221310319. The next prime is 201221310331. The reversal of 201221310330 is 33013122102.

201221310330 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 21 + 310 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201221310331) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1420954 + ... + 1556133.

It is an arithmetic number, because the mean of its divisors is an integer number (10914004608).

Almost surely, 2^201221310330 is an apocalyptic number.

201221310330 is an abundant number, since it is smaller than the sum of its proper divisors (322650910854).

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

201221310330 is a wasteful number, since it uses less digits than its factorization.

201221310330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977851 (or 2977848 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 201221310330 its reverse (33013122102), we get a palindrome (234234432432).

The spelling of 201221310330 in words is "two hundred one billion, two hundred twenty-one million, three hundred ten thousand, three hundred thirty".