221222110001012 has 12 divisors (see below), whose sum is σ = 387148109244036. Its totient is φ = 110608364502720.

The previous prime is 221222110001003. The next prime is 221222110001093. The reversal of 221222110001012 is 210100011222122.

It can be written as a sum of positive squares in 2 ways, for example, as 204628332986896 + 16593777014116 = 14304836^2 + 4073546^2 .

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, 672439439 + ... + 672768342.

It is an arithmetic number, because the mean of its divisors is an integer number (32262342437003).

Almost surely, 2^{221222110001012} is an apocalyptic number.

It is an amenable number.

221222110001012 is a deficient number, since it is larger than the sum of its proper divisors (165925999243024).

221222110001012 is a wasteful number, since it uses less digits than its factorization.

221222110001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345248898 (or 1345248896 counting only the distinct ones).

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

Adding to 221222110001012 its reverse (210100011222122), we get a palindrome (431322121223134).

The spelling of 221222110001012 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred ten million, one thousand, twelve".