211223320320 has 144 divisors (see below), whose sum is σ = 690283262592. Its totient is φ = 55016263680.

The previous prime is 211223320307. The next prime is 211223320369. The reversal of 211223320320 is 23023322112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474486 + ... + 804725.

It is an arithmetic number, because the mean of its divisors is an integer number (4793633768).

Almost surely, 2^211223320320 is an apocalyptic number.

211223320320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211223320320 is an abundant number, since it is smaller than the sum of its proper divisors (479059942272).

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

211223320320 is a wasteful number, since it uses less digits than its factorization.

211223320320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279278 (or 1279264 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 211223320320 its reverse (23023322112), we get a palindrome (234246642432).

The spelling of 211223320320 in words is "two hundred eleven billion, two hundred twenty-three million, three hundred twenty thousand, three hundred twenty".