221220300211320 has 128 divisors (see below), whose sum is σ = 702746108928000. Its totient is φ = 55518296918016.

The previous prime is 221220300211297. The next prime is 221220300211399. The reversal of 221220300211320 is 23112003022122.

It is a super-2 number, since 2×221220300211320² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 27438577 + ... + 34573343.

It is an arithmetic number, because the mean of its divisors is an integer number (5490203976000).

Almost surely, 2^{221220300211320} is an apocalyptic number.

221220300211320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220300211320 is an abundant number, since it is smaller than the sum of its proper divisors (481525808716680).

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

221220300211320 is a wasteful number, since it uses less digits than its factorization.

221220300211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7149997 (or 7149993 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221220300211320 its reverse (23112003022122), we get a palindrome (244332303233442).

The spelling of 221220300211320 in words is "two hundred twenty-one trillion, two hundred twenty billion, three hundred million, two hundred eleven thousand, three hundred twenty".