211423110320 has 80 divisors (see below), whose sum is σ = 508664988000. Its totient is φ = 81628022784.

The previous prime is 211423110319. The next prime is 211423110373. The reversal of 211423110320 is 23011324112.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 211423110292 and 211423110301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8731991 + ... + 8756169.

It is an arithmetic number, because the mean of its divisors is an integer number (6358312350).

Almost surely, 2^211423110320 is an apocalyptic number.

211423110320 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 211423110320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254332494000).

211423110320 is an abundant number, since it is smaller than the sum of its proper divisors (297241877680).

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

211423110320 is a wasteful number, since it uses less digits than its factorization.

211423110320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27990 (or 27984 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 211423110320 its reverse (23011324112), we get a palindrome (234434434432).

The spelling of 211423110320 in words is "two hundred eleven billion, four hundred twenty-three million, one hundred ten thousand, three hundred twenty".