21212340314 has 16 divisors (see below), whose sum is σ = 35557716096. Its totient is φ = 9406802400.

The previous prime is 21212340313. The next prime is 21212340349. The reversal of 21212340314 is 41304321212.

It is a self number, because there is not a number n which added to its sum of digits gives 21212340314.

It is not an unprimeable number, because it can be changed into a prime (21212340311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11757602 + ... + 11759405.

It is an arithmetic number, because the mean of its divisors is an integer number (2222357256).

Almost surely, 2^21212340314 is an apocalyptic number.

21212340314 is a deficient number, since it is larger than the sum of its proper divisors (14345375782).

21212340314 is a wasteful number, since it uses less digits than its factorization.

21212340314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23517061.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21212340314 its reverse (41304321212), we get a palindrome (62516661526).

The spelling of 21212340314 in words is "twenty-one billion, two hundred twelve million, three hundred forty thousand, three hundred fourteen".