2105421010 has 64 divisors (see below), whose sum is σ = 4734339840. Its totient is φ = 654923520.

The previous prime is 2105420969. The next prime is 2105421023. The reversal of 2105421010 is 101245012.

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 31 ways as a sum of consecutive naturals, for example, 426436 + ... + 431344.

It is an arithmetic number, because the mean of its divisors is an integer number (73974060).

Almost surely, 2^2105421010 is an apocalyptic number.

2105421010 is an abundant number, since it is smaller than the sum of its proper divisors (2628918830).

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

2105421010 is a wasteful number, since it uses less digits than its factorization.

2105421010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2105421010 is about 45884.8668953066. The cubic root of 2105421010 is about 1281.6801280901.

Adding to 2105421010 its reverse (101245012), we get a palindrome (2206666022).

It can be divided in two parts, 2105 and 421010, that multiplied together give a triangular number (886226050 = T₄₂₁₀₀).

The spelling of 2105421010 in words is "two billion, one hundred five million, four hundred twenty-one thousand, ten".