211223200221 has 96 divisors (see below), whose sum is σ = 352745902080. Its totient is φ = 120644899200.

The previous prime is 211223200207. The next prime is 211223200289. The reversal of 211223200221 is 122002322112.

211223200221 is a `hidden beast` number, since 2 + 1 + 122 + 320 + 0 + 221 = 666.

211223200221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211223200221 - 2¹⁴ = 211223183837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211223200194 and 211223200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211223200421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14198175 + ... + 14213043.

It is an arithmetic number, because the mean of its divisors is an integer number (3674436480).

Almost surely, 2^211223200221 is an apocalyptic number.

It is an amenable number.

211223200221 is a deficient number, since it is larger than the sum of its proper divisors (141522701859).

211223200221 is a wasteful number, since it uses less digits than its factorization.

211223200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15047 (or 15044 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 211223200221 its reverse (122002322112), we get a palindrome (333225522333).

The spelling of 211223200221 in words is "two hundred eleven billion, two hundred twenty-three million, two hundred thousand, two hundred twenty-one".