21324220122044 has 54 divisors (see below), whose sum is σ = 46113757897536. Its totient is φ = 8601366076800.

The previous prime is 21324220121957. The next prime is 21324220122103. The reversal of 21324220122044 is 44022102242312.

It is a junction number, because it is equal to n+sod(n) for n = 21324220121998 and 21324220122016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 188173532 + ... + 188286819.

It is an arithmetic number, because the mean of its divisors is an integer number (853958479584).

Almost surely, 2^{21324220122044} is an apocalyptic number.

It is an amenable number.

21324220122044 is an abundant number, since it is smaller than the sum of its proper divisors (24789537775492).

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

21324220122044 is a wasteful number, since it uses less digits than its factorization.

21324220122044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376460403 (or 376460377 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 21324220122044 its reverse (44022102242312), we get a palindrome (65346322364356).

The spelling of 21324220122044 in words is "twenty-one trillion, three hundred twenty-four billion, two hundred twenty million, one hundred twenty-two thousand, forty-four".