221030310320 has 80 divisors (see below), whose sum is σ = 555701897088. Its totient is φ = 81440931840.

The previous prime is 221030310307. The next prime is 221030310343. The reversal of 221030310320 is 23013030122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1665041 + ... + 1792880.

Almost surely, 2^221030310320 is an apocalyptic number.

221030310320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221030310320 is an abundant number, since it is smaller than the sum of its proper divisors (334671586768).

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

221030310320 is a wasteful number, since it uses less digits than its factorization.

221030310320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457998 (or 3457992 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 221030310320 its reverse (23013030122), we get a palindrome (244043340442).

The spelling of 221030310320 in words is "two hundred twenty-one billion, thirty million, three hundred ten thousand, three hundred twenty".