221012210220212 has 12 divisors (see below), whose sum is σ = 386944265249220. Its totient is φ = 110456705863296.

The previous prime is 221012210220169. The next prime is 221012210220259. The reversal of 221012210220212 is 212022012210122.

It can be written as a sum of positive squares in 2 ways, for example, as 156244900041616 + 64767310178596 = 12499796^2 + 8047814^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 12349801637 + ... + 12349819532.

It is an arithmetic number, because the mean of its divisors is an integer number (32245355437435).

Almost surely, 2^{221012210220212} is an apocalyptic number.

It is an amenable number.

221012210220212 is a deficient number, since it is larger than the sum of its proper divisors (165932055029008).

221012210220212 is a wasteful number, since it uses less digits than its factorization.

221012210220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24699623410 (or 24699623408 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221012210220212 its reverse (212022012210122), we get a palindrome (433034222430334).

The spelling of 221012210220212 in words is "two hundred twenty-one trillion, twelve billion, two hundred ten million, two hundred twenty thousand, two hundred twelve".