221220303000 has 256 divisors, whose sum is σ = 740071987200. Its totient is φ = 54818150400.

The previous prime is 221220302971. The next prime is 221220303037. The reversal of 221220303000 is 303022122.

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 polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4001547 + ... + 4056453.

It is an arithmetic number, because the mean of its divisors is an integer number (2890906200).

Almost surely, 2^221220303000 is an apocalyptic number.

221220303000 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 221220303000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370035993600).

221220303000 is an abundant number, since it is smaller than the sum of its proper divisors (518851684200).

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

221220303000 is a wasteful number, since it uses less digits than its factorization.

221220303000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55027 (or 55013 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 221220303000 its reverse (303022122), we get a palindrome (221523325122).

The spelling of 221220303000 in words is "two hundred twenty-one billion, two hundred twenty million, three hundred three thousand".