221222133320 has 32 divisors (see below), whose sum is σ = 497792908800. Its totient is φ = 88481189568.

The previous prime is 221222133317. The next prime is 221222133389. The reversal of 221222133320 is 23331222122.

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, 239987 + ... + 707133.

It is an arithmetic number, because the mean of its divisors is an integer number (15556028400).

Almost surely, 2^221222133320 is an apocalyptic number.

221222133320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222133320 is an abundant number, since it is smaller than the sum of its proper divisors (276570775480).

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

221222133320 is a wasteful number, since it uses less digits than its factorization.

221222133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478997 (or 478993 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 221222133320 its reverse (23331222122), we get a palindrome (244553355442).

The spelling of 221222133320 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred thirty-three thousand, three hundred twenty".