2101110102 has 72 divisors (see below), whose sum is σ = 5703044256. Its totient is φ = 554135904.

The previous prime is 2101110097. The next prime is 2101110103. The reversal of 2101110102 is 2010111012.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101110103) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 80158 + ... + 103089.

It is an arithmetic number, because the mean of its divisors is an integer number (79208948).

Almost surely, 2^2101110102 is an apocalyptic number.

2101110102 is an abundant number, since it is smaller than the sum of its proper divisors (3601934154).

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

2101110102 is a wasteful number, since it uses less digits than its factorization.

2101110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183282 (or 183272 counting only the distinct ones).

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

The square root of 2101110102 is about 45837.8675551121. The cubic root of 2101110102 is about 1280.8047718248.

Adding to 2101110102 its reverse (2010111012), we get a palindrome (4111221114).

It can be divided in two parts, 210111010 and 2, that added together give a palindrome (210111012).

The spelling of 2101110102 in words is "two billion, one hundred one million, one hundred ten thousand, one hundred two".