21100123223122 has 8 divisors (see below), whose sum is σ = 31650207494400. Its totient is φ = 10550054058324.

The previous prime is 21100123223117. The next prime is 21100123223129. The reversal of 21100123223122 is 22132232100112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21100123223093 and 21100123223102.

It is not an unprimeable number, because it can be changed into a prime (21100123223129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847779 + ... + 6551257.

It is an arithmetic number, because the mean of its divisors is an integer number (3956275936800).

Almost surely, 2^{21100123223122} is an apocalyptic number.

21100123223122 is a deficient number, since it is larger than the sum of its proper divisors (10550084271278).

21100123223122 is a wasteful number, since it uses less digits than its factorization.

21100123223122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7553240.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21100123223122 its reverse (22132232100112), we get a palindrome (43232355323234).

The spelling of 21100123223122 in words is "twenty-one trillion, one hundred billion, one hundred twenty-three million, two hundred twenty-three thousand, one hundred twenty-two".