212023312340 has 48 divisors (see below), whose sum is σ = 509556133632. Its totient is φ = 72593680896.

The previous prime is 212023312331. The next prime is 212023312343. The reversal of 212023312340 is 43213320212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212023312343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939797 + ... + 1143356.

It is an arithmetic number, because the mean of its divisors is an integer number (10615752784).

Almost surely, 2^212023312340 is an apocalyptic number.

212023312340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212023312340 is an abundant number, since it is smaller than the sum of its proper divisors (297532821292).

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

212023312340 is a wasteful number, since it uses less digits than its factorization.

212023312340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083896 (or 2083894 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 212023312340 its reverse (43213320212), we get a palindrome (255236632552).

The spelling of 212023312340 in words is "two hundred twelve billion, twenty-three million, three hundred twelve thousand, three hundred forty".