21010110110 has 64 divisors (see below), whose sum is σ = 44748656064. Its totient is φ = 7015219200.

The previous prime is 21010110109. The next prime is 21010110113. The reversal of 21010110110 is 1101101012.

It is a happy number.

21010110110 is a modest number, since divided by 110110 gives 21010 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010110113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60347 + ... + 213686.

It is an arithmetic number, because the mean of its divisors is an integer number (699197751).

Almost surely, 2^21010110110 is an apocalyptic number.

21010110110 is an abundant number, since it is smaller than the sum of its proper divisors (23738545954).

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

21010110110 is a wasteful number, since it uses less digits than its factorization.

21010110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274109.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21010110110 its reverse (1101101012), we get a palindrome (22111211122).

The spelling of 21010110110 in words is "twenty-one billion, ten million, one hundred ten thousand, one hundred ten".