110212212221 has 2 divisors, whose sum is σ = 110212212222. Its totient is φ = 110212212220.

The previous prime is 110212212211. The next prime is 110212212239. The reversal of 110212212221 is 122212212011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74809908196 + 35402304025 = 273514^2 + 188155^2 .

It is a cyclic number.

It is not a de Polignac number, because 110212212221 - 2³⁴ = 93032343037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 110212212221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110212212211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55106106110 + 55106106111.

It is an arithmetic number, because the mean of its divisors is an integer number (55106106111).

Almost surely, 2^110212212221 is an apocalyptic number.

It is an amenable number.

110212212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110212212221 is an equidigital number, since it uses as much as digits as its factorization.

110212212221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 110212212221 its reverse (122212212011), we get a palindrome (232424424232).

The spelling of 110212212221 in words is "one hundred ten billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".