2105434121 has 8 divisors (see below), whose sum is σ = 2412915840. Its totient is φ = 1799628768.

The previous prime is 2105434117. The next prime is 2105434147. The reversal of 2105434121 is 1214345012.

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

It is not a de Polignac number, because 2105434121 - 2² = 2105434117 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2105434621) 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, 416396 + ... + 421421.

It is an arithmetic number, because the mean of its divisors is an integer number (301614480).

Almost surely, 2^2105434121 is an apocalyptic number.

It is an amenable number.

2105434121 is a deficient number, since it is larger than the sum of its proper divisors (307481719).

2105434121 is an equidigital number, since it uses as much as digits as its factorization.

2105434121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838183.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2105434121 is about 45885.0097635382. The cubic root of 2105434121 is about 1281.6827885356.

Adding to 2105434121 its reverse (1214345012), we get a palindrome (3319779133).

The spelling of 2105434121 in words is "two billion, one hundred five million, four hundred thirty-four thousand, one hundred twenty-one".