211223032320 has 160 divisors (see below), whose sum is σ = 675914988672. Its totient is φ = 56270979072.

The previous prime is 211223032247. The next prime is 211223032343. The reversal of 211223032320 is 23230322112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

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, 8150904 + ... + 8176776.

Almost surely, 2^211223032320 is an apocalyptic number.

211223032320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211223032320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337957494336).

211223032320 is an abundant number, since it is smaller than the sum of its proper divisors (464691956352).

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

211223032320 is a wasteful number, since it uses less digits than its factorization.

211223032320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26962 (or 26946 counting only the distinct ones).

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

Adding to 211223032320 its reverse (23230322112), we get a palindrome (234453354432).

The spelling of 211223032320 in words is "two hundred eleven billion, two hundred twenty-three million, thirty-two thousand, three hundred twenty".