221010212210212 has 12 divisors (see below), whose sum is σ = 387420093752076. Its totient is φ = 110318756852480.

The previous prime is 221010212210201. The next prime is 221010212210219. The reversal of 221010212210212 is 212012212010122.

It can be written as a sum of positive squares in 2 ways, for example, as 158158391818816 + 62851820391396 = 12576104^2 + 7927914^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221010212210212.

It is not an unprimeable number, because it can be changed into a prime (221010212210219) 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 3 ways as a sum of consecutive naturals, for example, 46587310489 + ... + 46587315232.

It is an arithmetic number, because the mean of its divisors is an integer number (32285007812673).

Almost surely, 2^{221010212210212} is an apocalyptic number.

It is an amenable number.

221010212210212 is a deficient number, since it is larger than the sum of its proper divisors (166409881541864).

221010212210212 is a wasteful number, since it uses less digits than its factorization.

221010212210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93174626318 (or 93174626316 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221010212210212 its reverse (212012212010122), we get a palindrome (433022424220334).

The spelling of 221010212210212 in words is "two hundred twenty-one trillion, ten billion, two hundred twelve million, two hundred ten thousand, two hundred twelve".