212211111000221 has 16 divisors (see below), whose sum is σ = 221263424102400. Its totient is φ = 203274533000448.

The previous prime is 212211111000197. The next prime is 212211111000233. The reversal of 212211111000221 is 122000111112212.

212211111000221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212211111000221 - 2³⁴ = 212193931131037 is a prime.

It is a super-2 number, since 2×212211111000221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212211111000221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211111000281) 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, 135636821 + ... + 137192453.

It is an arithmetic number, because the mean of its divisors is an integer number (13828964006400).

Almost surely, 2^{212211111000221} is an apocalyptic number.

It is an amenable number.

212211111000221 is a deficient number, since it is larger than the sum of its proper divisors (9052313102179).

212211111000221 is a wasteful number, since it uses less digits than its factorization.

212211111000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592828.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212211111000221 its reverse (122000111112212), we get a palindrome (334211222112433).

The spelling of 212211111000221 in words is "two hundred twelve trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-one", and thus it is an aban number.