221330213220 has 24 divisors (see below), whose sum is σ = 619724597184. Its totient is φ = 59021390176.

The previous prime is 221330213201. The next prime is 221330213233. The reversal of 221330213220 is 22312033122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844418384 + ... + 1844418503.

It is an arithmetic number, because the mean of its divisors is an integer number (25821858216).

Almost surely, 2^221330213220 is an apocalyptic number.

221330213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221330213220 is an abundant number, since it is smaller than the sum of its proper divisors (398394383964).

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

221330213220 is a wasteful number, since it uses less digits than its factorization.

221330213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688836899 (or 3688836897 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 221330213220 its reverse (22312033122), we get a palindrome (243642246342).

The spelling of 221330213220 in words is "two hundred twenty-one billion, three hundred thirty million, two hundred thirteen thousand, two hundred twenty".