2101200102 has 96 divisors (see below), whose sum is σ = 5023130112. Its totient is φ = 656014464.

The previous prime is 2101200097. The next prime is 2101200137. The reversal of 2101200102 is 2010021012.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2172423 + ... + 2173389.

It is an arithmetic number, because the mean of its divisors is an integer number (52324272).

Almost surely, 2^2101200102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101200102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2511565056).

2101200102 is an abundant number, since it is smaller than the sum of its proper divisors (2921930010).

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

2101200102 is a wasteful number, since it uses less digits than its factorization.

2101200102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2101200102 is about 45838.8492656611. The cubic root of 2101200102 is about 1280.8230591076.

Adding to 2101200102 its reverse (2010021012), we get a palindrome (4111221114).

The spelling of 2101200102 in words is "two billion, one hundred one million, two hundred thousand, one hundred two".