221330202120 has 96 divisors (see below), whose sum is σ = 719506494720. Its totient is φ = 59006344320.

The previous prime is 221330202083. The next prime is 221330202143. The reversal of 221330202120 is 21202033122.

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

It is a junction number, because it is equal to n+sod(n) for n = 221330202093 and 221330202102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1373385 + ... + 1526055.

It is an arithmetic number, because the mean of its divisors is an integer number (7494859320).

Almost surely, 2^221330202120 is an apocalyptic number.

221330202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221330202120 is an abundant number, since it is smaller than the sum of its proper divisors (498176292600).

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

221330202120 is a wasteful number, since it uses less digits than its factorization.

221330202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156715 (or 156708 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221330202120 its reverse (21202033122), we get a palindrome (242532235242).

The spelling of 221330202120 in words is "two hundred twenty-one billion, three hundred thirty million, two hundred two thousand, one hundred twenty".