212211020000221 has 16 divisors (see below), whose sum is σ = 231944664595968. Its totient is φ = 192551087940400.

The previous prime is 212211020000159. The next prime is 212211020000237. The reversal of 212211020000221 is 122000020112212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212211020000221 - 2²¹ = 212211017903069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212211020000195 and 212211020000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211020010221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44857866 + ... + 49362436.

It is an arithmetic number, because the mean of its divisors is an integer number (14496541537248).

Almost surely, 2^{212211020000221} is an apocalyptic number.

It is an amenable number.

212211020000221 is a deficient number, since it is larger than the sum of its proper divisors (19733644595747).

212211020000221 is a wasteful number, since it uses less digits than its factorization.

212211020000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512752.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212211020000221 its reverse (122000020112212), we get a palindrome (334211040112433).

The spelling of 212211020000221 in words is "two hundred twelve trillion, two hundred eleven billion, twenty million, two hundred twenty-one", and thus it is an aban number.