21120110106 has 32 divisors (see below), whose sum is σ = 44731709568. Its totient is φ = 6624913920.

The previous prime is 21120110083. The next prime is 21120110107. The reversal of 21120110106 is 60101102112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21120110107) 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 15 ways as a sum of consecutive naturals, for example, 954286 + ... + 976166.

It is an arithmetic number, because the mean of its divisors is an integer number (1397865924).

Almost surely, 2^21120110106 is an apocalyptic number.

21120110106 is an abundant number, since it is smaller than the sum of its proper divisors (23611599462).

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

21120110106 is a wasteful number, since it uses less digits than its factorization.

21120110106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31366.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21120110106 its reverse (60101102112), we get a palindrome (81221212218).

The spelling of 21120110106 in words is "twenty-one billion, one hundred twenty million, one hundred ten thousand, one hundred six".