221466305120 has 24 divisors (see below), whose sum is σ = 523214146224. Its totient is φ = 88586521984.

The previous prime is 221466305117. The next prime is 221466305131. The reversal of 221466305120 is 21503664122.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692082044 + ... + 692082363.

It is an arithmetic number, because the mean of its divisors is an integer number (21800589426).

Almost surely, 2^221466305120 is an apocalyptic number.

221466305120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221466305120 is an abundant number, since it is smaller than the sum of its proper divisors (301747841104).

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

221466305120 is a wasteful number, since it uses less digits than its factorization.

221466305120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384164422 (or 1384164414 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 221466305120 its reverse (21503664122), we get a palindrome (242969969242).

The spelling of 221466305120 in words is "two hundred twenty-one billion, four hundred sixty-six million, three hundred five thousand, one hundred twenty".