211344012 has 96 divisors (see below), whose sum is σ = 612460800. Its totient is φ = 62467200.

The previous prime is 211343999. The next prime is 211344031. The reversal of 211344012 is 210443112.

211344012 is a `hidden beast` number, since 211 + 3 + 440 + 12 = 666.

It is a super-2 number, since 2×211344012² = 89332582816512288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46539 + ... + 50877.

It is an arithmetic number, because the mean of its divisors is an integer number (6379800).

Almost surely, 2^211344012 is an apocalyptic number.

211344012 is a gapful number since it is divisible by the number (22) 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 211344012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306230400).

211344012 is an abundant number, since it is smaller than the sum of its proper divisors (401116788).

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

211344012 is a wasteful number, since it uses less digits than its factorization.

211344012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404 (or 4396 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 211344012 is about 14537.6756051303. The cubic root of 211344012 is about 595.6575476658.

Adding to 211344012 its reverse (210443112), we get a palindrome (421787124).

The spelling of 211344012 in words is "two hundred eleven million, three hundred forty-four thousand, twelve".