213022444221 has 12 divisors (see below), whose sum is σ = 325799032572. Its totient is φ = 133661141376.

The previous prime is 213022444207. The next prime is 213022444231. The reversal of 213022444221 is 122444220312.

It is a happy number.

213022444221 is a `hidden beast` number, since 2 + 13 + 0 + 224 + 4 + 422 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 142272296100 + 70750148121 = 377190^2 + 265989^2 .

It is not a de Polignac number, because 213022444221 - 2⁵ = 213022444189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213022444231) 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, 696151626 + ... + 696151931.

It is an arithmetic number, because the mean of its divisors is an integer number (27149919381).

Almost surely, 2^213022444221 is an apocalyptic number.

It is an amenable number.

213022444221 is a deficient number, since it is larger than the sum of its proper divisors (112776588351).

213022444221 is a wasteful number, since it uses less digits than its factorization.

213022444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392303580 (or 1392303577 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 213022444221 its reverse (122444220312), we get a palindrome (335466664533).

The spelling of 213022444221 in words is "two hundred thirteen billion, twenty-two million, four hundred forty-four thousand, two hundred twenty-one".