21120243214 has 8 divisors (see below), whose sum is σ = 36206131248. Its totient is φ = 9051532800.

The previous prime is 21120243197. The next prime is 21120243223. The reversal of 21120243214 is 41234202112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754294387 + ... + 754294414.

It is an arithmetic number, because the mean of its divisors is an integer number (4525766406).

Almost surely, 2^21120243214 is an apocalyptic number.

21120243214 is a deficient number, since it is larger than the sum of its proper divisors (15085888034).

21120243214 is a wasteful number, since it uses less digits than its factorization.

21120243214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508588810.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21120243214 its reverse (41234202112), we get a palindrome (62354445326).

The spelling of 21120243214 in words is "twenty-one billion, one hundred twenty million, two hundred forty-three thousand, two hundred fourteen".