21112102122 has 8 divisors (see below), whose sum is σ = 42224204256. Its totient is φ = 7037367372.

The previous prime is 21112102027. The next prime is 21112102147. The reversal of 21112102122 is 22120121112.

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

21112102122 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759341838 + ... + 1759341849.

It is an arithmetic number, because the mean of its divisors is an integer number (5278025532).

Almost surely, 2^21112102122 is an apocalyptic number.

21112102122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21112102122 is a wasteful number, since it uses less digits than its factorization.

21112102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518683692.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112102122 its reverse (22120121112), we get a palindrome (43232223234).

The spelling of 21112102122 in words is "twenty-one billion, one hundred twelve million, one hundred two thousand, one hundred twenty-two".