2101220110 has 16 divisors (see below), whose sum is σ = 4126032432. Its totient is φ = 764080000.

The previous prime is 2101220087. The next prime is 2101220167. The reversal of 2101220110 is 110221012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9550891 + ... + 9551110.

It is an arithmetic number, because the mean of its divisors is an integer number (257877027).

Almost surely, 2^2101220110 is an apocalyptic number.

2101220110 is a deficient number, since it is larger than the sum of its proper divisors (2024812322).

2101220110 is a wasteful number, since it uses less digits than its factorization.

2101220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19102019.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2101220110 is about 45839.0675079675. The cubic root of 2101220110 is about 1280.8271245028.

Adding to 2101220110 its reverse (110221012), we get a palindrome (2211441122).

The spelling of 2101220110 in words is "two billion, one hundred one million, two hundred twenty thousand, one hundred ten".