2129105085 has 8 divisors (see below), whose sum is σ = 3406568160. Its totient is φ = 1135522704.

The previous prime is 2129105071. The next prime is 2129105087. The reversal of 2129105085 is 5805019212.

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

It is not a de Polignac number, because 2129105085 - 2¹¹ = 2129103037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129105087) 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, 70970155 + ... + 70970184.

It is an arithmetic number, because the mean of its divisors is an integer number (425821020).

Almost surely, 2^2129105085 is an apocalyptic number.

It is an amenable number.

2129105085 is a deficient number, since it is larger than the sum of its proper divisors (1277463075).

2129105085 is a wasteful number, since it uses less digits than its factorization.

2129105085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141940347.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 2129105085 is about 46142.2267017967. The cubic root of 2129105085 is about 1286.4681317863.

The spelling of 2129105085 in words is "two billion, one hundred twenty-nine million, one hundred five thousand, eighty-five".