211223104220 has 24 divisors (see below), whose sum is σ = 449183313600. Its totient is φ = 83419756992.

The previous prime is 211223104123. The next prime is 211223104241. The reversal of 211223104220 is 22401322112.

211223104220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 211223104192 and 211223104201.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 66841175 + ... + 66844334.

It is an arithmetic number, because the mean of its divisors is an integer number (18715971400).

Almost surely, 2^211223104220 is an apocalyptic number.

211223104220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211223104220 is an abundant number, since it is smaller than the sum of its proper divisors (237960209380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211223104220 is a wasteful number, since it uses less digits than its factorization.

211223104220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133685597 (or 133685595 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 211223104220 its reverse (22401322112), we get a palindrome (233624426332).

The spelling of 211223104220 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred four thousand, two hundred twenty".