2105421033 has 8 divisors (see below), whose sum is σ = 2807459200.
Its totient is φ = 1403498448.
The previous prime is 2105421023. The next prime is 2105421037. The reversal of 2105421033 is 3301245012.
Adding to 2105421033 its reverse (3301245012), we get a palindrome (5406666045).
It can be divided in two parts, 210542 and 1033, that added together give a triangular number (211575 = T650).
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 2105421033 - 26 = 2105420969 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (2105421037) 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, 31863 + ... + 72291.
It is an arithmetic number, because the mean of its divisors is an integer number (350932400).
Almost surely, 22105421033 is an apocalyptic number.
It is an amenable number.
2105421033 is a deficient number, since it is larger than the sum of its proper divisors (702038167).
2105421033 is a wasteful number, since it uses less digits than its factorization.
2105421033 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 57791.
The product of its (nonzero) digits is 720, while the sum is 21.
The square root of 2105421033 is about 45884.8671459339.
The cubic root of 2105421033 is about 1281.6801327572.
The spelling of 2105421033 in words is "two billion, one hundred five million, four hundred twenty-one thousand, thirty-three".