21212100000110 has 16 divisors (see below), whose sum is σ = 38183024137536. Its totient is φ = 8484563525088.

The previous prime is 21212100000083. The next prime is 21212100000187. The reversal of 21212100000110 is 1100000121212.

It is a super-3 number, since 3×21212100000110³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212100000091 and 21212100000100.

It is a congruent number.

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, 34236989 + ... + 34851048.

It is an arithmetic number, because the mean of its divisors is an integer number (2386439008596).

Almost surely, 2^{21212100000110} is an apocalyptic number.

21212100000110 is a deficient number, since it is larger than the sum of its proper divisors (16970924137426).

21212100000110 is a wasteful number, since it uses less digits than its factorization.

21212100000110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69118747.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21212100000110 its reverse (1100000121212), we get a palindrome (22312100121322).

The spelling of 21212100000110 in words is "twenty-one trillion, two hundred twelve billion, one hundred million, one hundred ten", and thus it is an aban number.