221320222300 has 72 divisors (see below), whose sum is σ = 497804638464. Its totient is φ = 85351189440.

The previous prime is 221320222297. The next prime is 221320222363. The reversal of 221320222300 is 3222023122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36514 + ... + 666313.

It is an arithmetic number, because the mean of its divisors is an integer number (6913953312).

Almost surely, 2^221320222300 is an apocalyptic number.

221320222300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221320222300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248902319232).

221320222300 is an abundant number, since it is smaller than the sum of its proper divisors (276484416164).

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

221320222300 is a wasteful number, since it uses less digits than its factorization.

221320222300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702955 (or 702948 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 221320222300 its reverse (3222023122), we get a palindrome (224542245422).

The spelling of 221320222300 in words is "two hundred twenty-one billion, three hundred twenty million, two hundred twenty-two thousand, three hundred".