211240000000 has 160 divisors (see below), whose sum is σ = 527682828816. Its totient is φ = 84480000000.

The previous prime is 211239999989. The next prime is 211240000009. The reversal of 211240000000 is 42112.

It can be written as a sum of positive squares in 8 ways, for example, as 209822628096 + 1417371904 = 458064^2 + 37648^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (211240000009) 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, 39997360 + ... + 40002640.

Almost surely, 2^211240000000 is an apocalyptic number.

211240000000 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 211240000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263841414408).

211240000000 is an abundant number, since it is smaller than the sum of its proper divisors (316442828816).

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

211240000000 is an frugal number, since it uses more digits than its factorization.

211240000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5334 (or 5288 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 211240000000 its reverse (42112), we get a palindrome (211240042112).

The spelling of 211240000000 in words is "two hundred eleven billion, two hundred forty million", and thus it is an aban number.