221250520000 has 70 divisors (see below), whose sum is σ = 548629482368. Its totient is φ = 88500192000.

The previous prime is 221250519913. The next prime is 221250520061. The reversal of 221250520000 is 25052122.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 221250520000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2725632 + ... + 2805631.

Almost surely, 2^221250520000 is an apocalyptic number.

221250520000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221250520000 is an abundant number, since it is smaller than the sum of its proper divisors (327378962368).

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

221250520000 is an frugal number, since it uses more digits than its factorization.

221250520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531295 (or 5531270 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 221250520000 its reverse (25052122), we get a palindrome (221275572122).

The spelling of 221250520000 in words is "two hundred twenty-one billion, two hundred fifty million, five hundred twenty thousand".