2101000002 has 16 divisors (see below), whose sum is σ = 4211709600. Its totient is φ = 698715072.

The previous prime is 2100999947. The next prime is 2101000007. The reversal of 2101000002 is 2000001012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (2101000007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401752 + ... + 406947.

It is an arithmetic number, because the mean of its divisors is an integer number (263231850).

Almost surely, 2^2101000002 is an apocalyptic number.

2101000002 is an abundant number, since it is smaller than the sum of its proper divisors (2110709598).

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

2101000002 is a wasteful number, since it uses less digits than its factorization.

2101000002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809137.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 2101000002 is about 45836.6665672800. Note that the first 3 decimals coincide. The cubic root of 2101000002 is about 1280.7823996720.

Adding to 2101000002 its reverse (2000001012), we get a palindrome (4101001014).

The spelling of 2101000002 in words is "two billion, one hundred one million, two", and thus it is an aban number.