221212321002330 has 64 divisors (see below), whose sum is σ = 606887945883648. Its totient is φ = 50551636968000.

The previous prime is 221212321002269. The next prime is 221212321002331. The reversal of 221212321002330 is 33200123212122.

It is a self number, because there is not a number n which added to its sum of digits gives 221212321002330.

It is not an unprimeable number, because it can be changed into a prime (221212321002331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115498546 + ... + 117398205.

It is an arithmetic number, because the mean of its divisors is an integer number (9482624154432).

Almost surely, 2^{221212321002330} is an apocalyptic number.

221212321002330 is an abundant number, since it is smaller than the sum of its proper divisors (385675624881318).

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

221212321002330 is a wasteful number, since it uses less digits than its factorization.

221212321002330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232901291.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 221212321002330 its reverse (33200123212122), we get a palindrome (254412444214452).

The spelling of 221212321002330 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, two thousand, three hundred thirty".