21340030122 has 56 divisors (see below), whose sum is σ = 48237382116. Its totient is φ = 7077139776.

The previous prime is 21340030109. The next prime is 21340030157. The reversal of 21340030122 is 22103004312.

21340030122 is a `hidden beast` number, since 2 + 1 + 340 + 0 + 301 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15472623321 + 5867406801 = 124389^2 + 76599^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21340030095 and 21340030104.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 250078 + ... + 324374.

Almost surely, 2^21340030122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21340030122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24118691058).

21340030122 is an abundant number, since it is smaller than the sum of its proper divisors (26897351994).

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

21340030122 is an equidigital number, since it uses as much as digits as its factorization.

21340030122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74514 (or 74499 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21340030122 its reverse (22103004312), we get a palindrome (43443034434).

The spelling of 21340030122 in words is "twenty-one billion, three hundred forty million, thirty thousand, one hundred twenty-two".