2102421006 has 96 divisors (see below), whose sum is σ = 5306545920. Its totient is φ = 589171968.

The previous prime is 2102420987. The next prime is 2102421011. The reversal of 2102421006 is 6001242012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 2102421006.

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, 2844585 + ... + 2845323.

It is an arithmetic number, because the mean of its divisors is an integer number (55276520).

Almost surely, 2^2102421006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102421006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2653272960).

2102421006 is an abundant number, since it is smaller than the sum of its proper divisors (3204124914).

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

2102421006 is a wasteful number, since it uses less digits than its factorization.

2102421006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2102421006 is about 45852.1646817247. The cubic root of 2102421006 is about 1281.0710854961.

Adding to 2102421006 its reverse (6001242012), we get a palindrome (8103663018).

The spelling of 2102421006 in words is "two billion, one hundred two million, four hundred twenty-one thousand, six".