212224100221 has 8 divisors (see below), whose sum is σ = 243881840384. Its totient is φ = 180901362960.

The previous prime is 212224100203. The next prime is 212224100237. The reversal of 212224100221 is 122001422212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212224100221 - 2²³ = 212215711613 is a prime.

It is a super-2 number, since 2×212224100221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212224100021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83749365 + ... + 83751898.

It is an arithmetic number, because the mean of its divisors is an integer number (30485230048).

Almost surely, 2^212224100221 is an apocalyptic number.

It is an amenable number.

212224100221 is a deficient number, since it is larger than the sum of its proper divisors (31657740163).

212224100221 is a wasteful number, since it uses less digits than its factorization.

212224100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167501451.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212224100221 its reverse (122001422212), we get a palindrome (334225522433).

It can be divided in two parts, 212224 and 100221, that added together give a triangular number (312445 = T₇₉₀).

The spelling of 212224100221 in words is "two hundred twelve billion, two hundred twenty-four million, one hundred thousand, two hundred twenty-one".