221120002120020 has 48 divisors (see below), whose sum is σ = 619138140129600. Its totient is φ = 58965130642176.

The previous prime is 221120002120009. The next prime is 221120002120051. The reversal of 221120002120020 is 20021200021122.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 15 ways as a sum of consecutive naturals, for example, 11619699 + ... + 24026181.

It is an arithmetic number, because the mean of its divisors is an integer number (12898711252700).

Almost surely, 2^{221120002120020} is an apocalyptic number.

221120002120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120002120020 is an abundant number, since it is smaller than the sum of its proper divisors (398018138009580).

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

221120002120020 is a wasteful number, since it uses less digits than its factorization.

221120002120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12703544 (or 12703542 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221120002120020 its reverse (20021200021122), we get a palindrome (241141202141142).

The spelling of 221120002120020 in words is "two hundred twenty-one trillion, one hundred twenty billion, two million, one hundred twenty thousand, twenty".