21324220122042 has 16 divisors (see below), whose sum is σ = 47387155826880. Its totient is φ = 7108073373996.

The previous prime is 21324220121957. The next prime is 21324220122103. The reversal of 21324220122042 is 24022102242312.

21324220122042 is a `hidden beast` number, since 2 + 1 + 32 + 422 + 0 + 1 + 2 + 204 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21324220121997 and 21324220122015.

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 7 ways as a sum of consecutive naturals, for example, 197446482558 + ... + 197446482665.

It is an arithmetic number, because the mean of its divisors is an integer number (2961697239180).

Almost surely, 2^{21324220122042} is an apocalyptic number.

21324220122042 is an abundant number, since it is smaller than the sum of its proper divisors (26062935704838).

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

21324220122042 is a wasteful number, since it uses less digits than its factorization.

21324220122042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394892965234 (or 394892965228 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21324220122042 its reverse (24022102242312), we get a palindrome (45346322364354).

The spelling of 21324220122042 in words is "twenty-one trillion, three hundred twenty-four billion, two hundred twenty million, one hundred twenty-two thousand, forty-two".