21100343422122 has 192 divisors, whose sum is σ = 49210596864000. Its totient is φ = 6514115105664.

The previous prime is 21100343422111. The next prime is 21100343422153. The reversal of 21100343422122 is 22122434300112.

21100343422122 is a `hidden beast` number, since 2 + 1 + 1 + 0 + 0 + 3 + 434 + 221 + 2 + 2 = 666.

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 95 ways as a sum of consecutive naturals, for example, 2762182779 + ... + 2762190417.

It is an arithmetic number, because the mean of its divisors is an integer number (256305192000).

Almost surely, 2^{21100343422122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100343422122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24605298432000).

21100343422122 is an abundant number, since it is smaller than the sum of its proper divisors (28110253441878).

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

21100343422122 is a wasteful number, since it uses less digits than its factorization.

21100343422122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465 (or 8462 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21100343422122 its reverse (22122434300112), we get a palindrome (43222777722234).

The spelling of 21100343422122 in words is "twenty-one trillion, one hundred billion, three hundred forty-three million, four hundred twenty-two thousand, one hundred twenty-two".