21012100000110 has 64 divisors (see below), whose sum is σ = 56609918971200. Its totient is φ = 5545461436416.

The previous prime is 21012100000097. The next prime is 21012100000121. The reversal of 21012100000110 is 1100000121012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21012100000092 and 21012100000101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 401121195 + ... + 401173574.

It is an arithmetic number, because the mean of its divisors is an integer number (884529983925).

Almost surely, 2^{21012100000110} is an apocalyptic number.

21012100000110 is an abundant number, since it is smaller than the sum of its proper divisors (35597818971090).

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

21012100000110 is a wasteful number, since it uses less digits than its factorization.

21012100000110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802294882 (or 802294876 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21012100000110 its reverse (1100000121012), we get a palindrome (22112100121122).

The spelling of 21012100000110 in words is "twenty-one trillion, twelve billion, one hundred million, one hundred ten", and thus it is an aban number.