221212132212330 has 320 divisors, whose sum is σ = 684385331984640. Its totient is φ = 50221103901696.

The previous prime is 221212132212329. The next prime is 221212132212371. The reversal of 221212132212330 is 33212231212122.

221212132212330 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 1 + 2 + 1 + 322 + 1 + 2 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 221212132212294 and 221212132212303.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2343823081 + ... + 2343917459.

It is an arithmetic number, because the mean of its divisors is an integer number (2138704162452).

Almost surely, 2^{221212132212330} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221212132212330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342192665992320).

221212132212330 is an abundant number, since it is smaller than the sum of its proper divisors (463173199772310).

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

221212132212330 is a wasteful number, since it uses less digits than its factorization.

221212132212330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97195 (or 97186 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 221212132212330 its reverse (33212231212122), we get a palindrome (254424363424452).

The spelling of 221212132212330 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred thirty-two million, two hundred twelve thousand, three hundred thirty".