21123214314 has 16 divisors (see below), whose sum is σ = 42755422752. Its totient is φ = 6956239088.

The previous prime is 21123214249. The next prime is 21123214319. The reversal of 21123214314 is 41341232112.

It is not an unprimeable number, because it can be changed into a prime (21123214319) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 21207549 + ... + 21208544.

It is an arithmetic number, because the mean of its divisors is an integer number (2672213922).

Almost surely, 2^21123214314 is an apocalyptic number.

21123214314 is an abundant number, since it is smaller than the sum of its proper divisors (21632208438).

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

21123214314 is a wasteful number, since it uses less digits than its factorization.

21123214314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42416181.

The product of its digits is 1152, while the sum is 24.

Adding to 21123214314 its reverse (41341232112), we get a palindrome (62464446426).

The spelling of 21123214314 in words is "twenty-one billion, one hundred twenty-three million, two hundred fourteen thousand, three hundred fourteen".