2105421331 has 8 divisors (see below), whose sum is σ = 2386712720. Its totient is φ = 1841177952.

The previous prime is 2105421281. The next prime is 2105421347. The reversal of 2105421331 is 1331245012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2105421331 - 2¹⁵ = 2105388563 is a prime.

It is a super-2 number, since 2×2105421331² = 8865597962059623122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105421361) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4261740 + ... + 4262233.

It is an arithmetic number, because the mean of its divisors is an integer number (298339090).

Almost surely, 2^2105421331 is an apocalyptic number.

2105421331 is a deficient number, since it is larger than the sum of its proper divisors (281291389).

2105421331 is a wasteful number, since it uses less digits than its factorization.

2105421331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8524005.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2105421331 is about 45884.8703931917. The cubic root of 2105421331 is about 1281.6801932266.

Adding to 2105421331 its reverse (1331245012), we get a palindrome (3436666343).

The spelling of 2105421331 in words is "two billion, one hundred five million, four hundred twenty-one thousand, three hundred thirty-one".