211223313220 has 24 divisors (see below), whose sum is σ = 445205755008. Its totient is φ = 84177554400.

The previous prime is 211223313181. The next prime is 211223313251. The reversal of 211223313220 is 22313322112.

It is a junction number, because it is equal to n+sod(n) for n = 211223313191 and 211223313200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19480126 + ... + 19490965.

It is an arithmetic number, because the mean of its divisors is an integer number (18550239792).

Almost surely, 2^211223313220 is an apocalyptic number.

211223313220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211223313220 is an abundant number, since it is smaller than the sum of its proper divisors (233982441788).

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

211223313220 is a wasteful number, since it uses less digits than its factorization.

211223313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38971371 (or 38971369 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 211223313220 its reverse (22313322112), we get a palindrome (233536635332).

The spelling of 211223313220 in words is "two hundred eleven billion, two hundred twenty-three million, three hundred thirteen thousand, two hundred twenty".