21340030123 has 8 divisors (see below), whose sum is σ = 21449020320. Its totient is φ = 21231260160.

The previous prime is 21340030109. The next prime is 21340030157. The reversal of 21340030123 is 32103004312.

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

It is a cyclic number.

It is not a de Polignac number, because 21340030123 - 2²¹ = 21337932971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21340030123.

It is not an unprimeable number, because it can be changed into a prime (21340033123) 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, 141003 + ... + 250123.

It is an arithmetic number, because the mean of its divisors is an integer number (2681127540).

Almost surely, 2^21340030123 is an apocalyptic number.

21340030123 is a deficient number, since it is larger than the sum of its proper divisors (108990197).

21340030123 is a wasteful number, since it uses less digits than its factorization.

21340030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110117.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21340030123 its reverse (32103004312), we get a palindrome (53443034435).

The spelling of 21340030123 in words is "twenty-one billion, three hundred forty million, thirty thousand, one hundred twenty-three".