221010100110 has 96 divisors (see below), whose sum is σ = 588154346208. Its totient is φ = 57549300480.

The previous prime is 221010100099. The next prime is 221010100211. The reversal of 221010100110 is 11001010122.

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 = 221010100092 and 221010100101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20819164 + ... + 20829776.

It is an arithmetic number, because the mean of its divisors is an integer number (6126607773).

Almost surely, 2^221010100110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221010100110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294077173104).

221010100110 is an abundant number, since it is smaller than the sum of its proper divisors (367144246098).

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

221010100110 is a wasteful number, since it uses less digits than its factorization.

221010100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16050 (or 16047 counting only the distinct ones).

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

Adding to 221010100110 its reverse (11001010122), we get a palindrome (232011110232).

The spelling of 221010100110 in words is "two hundred twenty-one billion, ten million, one hundred thousand, one hundred ten".