211304323128 has 64 divisors (see below), whose sum is σ = 546470046720. Its totient is φ = 68016614400.

The previous prime is 211304323121. The next prime is 211304323129. The reversal of 211304323128 is 821323403112.

It is a junction number, because it is equal to n+sod(n) for n = 211304323095 and 211304323104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211304323121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43368 + ... + 651528.

It is an arithmetic number, because the mean of its divisors is an integer number (8538594480).

Almost surely, 2^211304323128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211304323128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273235023360).

211304323128 is an abundant number, since it is smaller than the sum of its proper divisors (335165723592).

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

211304323128 is a wasteful number, since it uses less digits than its factorization.

211304323128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608668 (or 608664 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 211304323128 in words is "two hundred eleven billion, three hundred four million, three hundred twenty-three thousand, one hundred twenty-eight".