21110012106 has 16 divisors (see below), whose sum is σ = 44703555264. Its totient is φ = 6622748864.

The previous prime is 21110012087. The next prime is 21110012113. The reversal of 21110012106 is 60121001112.

It is a happy number.

It is a super-2 number, since 2×21110012106² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103480350 + ... + 103480553.

It is an arithmetic number, because the mean of its divisors is an integer number (2793972204).

Almost surely, 2^21110012106 is an apocalyptic number.

21110012106 is an abundant number, since it is smaller than the sum of its proper divisors (23593543158).

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

21110012106 is a wasteful number, since it uses less digits than its factorization.

21110012106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206960925.

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

Adding to 21110012106 its reverse (60121001112), we get a palindrome (81231013218).

The spelling of 21110012106 in words is "twenty-one billion, one hundred ten million, twelve thousand, one hundred six".