21312331214 has 8 divisors (see below), whose sum is σ = 33848996688. Its totient is φ = 10029332320.

The previous prime is 21312331171. The next prime is 21312331223. The reversal of 21312331214 is 41213321312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21312331214.

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, 313416602 + ... + 313416669.

It is an arithmetic number, because the mean of its divisors is an integer number (4231124586).

Almost surely, 2^21312331214 is an apocalyptic number.

21312331214 is a deficient number, since it is larger than the sum of its proper divisors (12536665474).

21312331214 is a wasteful number, since it uses less digits than its factorization.

21312331214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626833290.

The product of its digits is 864, while the sum is 23.

Adding to 21312331214 its reverse (41213321312), we get a palindrome (62525652526).

The spelling of 21312331214 in words is "twenty-one billion, three hundred twelve million, three hundred thirty-one thousand, two hundred fourteen".