221120121320 has 64 divisors (see below), whose sum is σ = 602041351680. Its totient is φ = 71353046016.

The previous prime is 221120121319. The next prime is 221120121347. The reversal of 221120121320 is 23121021122.

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, 23222144 + ... + 23231663.

It is an arithmetic number, because the mean of its divisors is an integer number (9406896120).

Almost surely, 2^221120121320 is an apocalyptic number.

221120121320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120121320 is an abundant number, since it is smaller than the sum of its proper divisors (380921230360).

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

221120121320 is a wasteful number, since it uses less digits than its factorization.

221120121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46453842 (or 46453838 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221120121320 its reverse (23121021122), we get a palindrome (244241142442).

The spelling of 221120121320 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, three hundred twenty".