221211130210212 has 48 divisors (see below), whose sum is σ = 518175714635712. Its totient is φ = 73448993587200.

The previous prime is 221211130210183. The next prime is 221211130210247. The reversal of 221211130210212 is 212012031112122.

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, 212254587 + ... + 213294237.

It is an arithmetic number, because the mean of its divisors is an integer number (10795327388244).

Almost surely, 2^{221211130210212} is an apocalyptic number.

It is an amenable number.

221211130210212 is an abundant number, since it is smaller than the sum of its proper divisors (296964584425500).

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

221211130210212 is a wasteful number, since it uses less digits than its factorization.

221211130210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108908 (or 1108906 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 221211130210212 its reverse (212012031112122), we get a palindrome (433223161322334).

The spelling of 221211130210212 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred thirty million, two hundred ten thousand, two hundred twelve".