1122212002221 has 12 divisors (see below), whose sum is σ = 1621066016700. Its totient is φ = 748098354240.

The previous prime is 1122212002211. The next prime is 1122212002243. The reversal of 1122212002221 is 1222002122211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 944562396996 + 177649605225 = 971886^2 + 421485^2 .

It is not a de Polignac number, because 1122212002221 - 2¹⁷ = 1122211871149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1122212002194 and 1122212002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122212002211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3415950 + ... + 3730031.

It is an arithmetic number, because the mean of its divisors is an integer number (135088834725).

Almost surely, 2^{1122212002221} is an apocalyptic number.

It is an amenable number.

1122212002221 is a deficient number, since it is larger than the sum of its proper divisors (498854014479).

1122212002221 is a wasteful number, since it uses less digits than its factorization.

1122212002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163436 (or 7163433 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1122212002221 its reverse (1222002122211), we get a palindrome (2344214124432).

The spelling of 1122212002221 in words is "one trillion, one hundred twenty-two billion, two hundred twelve million, two thousand, two hundred twenty-one".