221021223330 has 16 divisors (see below), whose sum is σ = 530450936064. Its totient is φ = 58938992880.

The previous prime is 221021223329. The next prime is 221021223347. The reversal of 221021223330 is 33322120122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221021223297 and 221021223306.

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, 3683687026 + ... + 3683687085.

It is an arithmetic number, because the mean of its divisors is an integer number (33153183504).

Almost surely, 2^221021223330 is an apocalyptic number.

221021223330 is an abundant number, since it is smaller than the sum of its proper divisors (309429712734).

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

221021223330 is a wasteful number, since it uses less digits than its factorization.

221021223330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367374121.

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

Adding to 221021223330 its reverse (33322120122), we get a palindrome (254343343452).

The spelling of 221021223330 in words is "two hundred twenty-one billion, twenty-one million, two hundred twenty-three thousand, three hundred thirty".