221311223020 has 48 divisors (see below), whose sum is σ = 468382134528. Its totient is φ = 87836024000.

The previous prime is 221311223017. The next prime is 221311223099. The reversal of 221311223020 is 20322113122.

221311223020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236447 + ... + 1404073.

It is an arithmetic number, because the mean of its divisors is an integer number (9757961136).

Almost surely, 2^221311223020 is an apocalyptic number.

221311223020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221311223020 is an abundant number, since it is smaller than the sum of its proper divisors (247070911508).

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

221311223020 is a wasteful number, since it uses less digits than its factorization.

221311223020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168150 (or 168148 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221311223020 its reverse (20322113122), we get a palindrome (241633336142).

The spelling of 221311223020 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred twenty-three thousand, twenty".