221212212221330 has 32 divisors (see below), whose sum is σ = 434402616133440. Its totient is φ = 80436679974720.

The previous prime is 221212212221311. The next prime is 221212212221359. The reversal of 221212212221330 is 33122212212122.

It is a self number, because there is not a number n which added to its sum of digits gives 221212212221330.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49400345 + ... + 53691884.

It is an arithmetic number, because the mean of its divisors is an integer number (13575081754170).

Almost surely, 2^{221212212221330} is an apocalyptic number.

221212212221330 is a deficient number, since it is larger than the sum of its proper divisors (213190403912110).

221212212221330 is a wasteful number, since it uses less digits than its factorization.

221212212221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103111754.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 221212212221330 its reverse (33122212212122), we get a palindrome (254334424433452).

The spelling of 221212212221330 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, three hundred thirty".