221012310330 has 96 divisors (see below), whose sum is σ = 657717061248. Its totient is φ = 50440579200.

The previous prime is 221012310317. The next prime is 221012310347. The reversal of 221012310330 is 33013210122.

221012310330 is a `hidden beast` number, since 2 + 2 + 10 + 12 + 310 + 330 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 151065 + ... + 681795.

It is an arithmetic number, because the mean of its divisors is an integer number (6851219388).

Almost surely, 2^221012310330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221012310330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328858530624).

221012310330 is an abundant number, since it is smaller than the sum of its proper divisors (436704750918).

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

221012310330 is a wasteful number, since it uses less digits than its factorization.

221012310330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531412 (or 531409 counting only the distinct ones).

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

Adding to 221012310330 its reverse (33013210122), we get a palindrome (254025520452).

The spelling of 221012310330 in words is "two hundred twenty-one billion, twelve million, three hundred ten thousand, three hundred thirty".