21110102006 has 64 divisors (see below), whose sum is σ = 38724950016. Its totient is φ = 8435750400.

The previous prime is 21110101997. The next prime is 21110102009. The reversal of 21110102006 is 60020101112.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110102009) 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 31 ways as a sum of consecutive naturals, for example, 2214791 + ... + 2224301.

It is an arithmetic number, because the mean of its divisors is an integer number (605077344).

Almost surely, 2^21110102006 is an apocalyptic number.

21110102006 is a deficient number, since it is larger than the sum of its proper divisors (17614848010).

21110102006 is a wasteful number, since it uses less digits than its factorization.

21110102006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21110102006 its reverse (60020101112), we get a palindrome (81130203118).

The spelling of 21110102006 in words is "twenty-one billion, one hundred ten million, one hundred two thousand, six".