2181012205 has 8 divisors (see below), whose sum is σ = 2672900352. Its totient is φ = 1707685968.

The previous prime is 2181012203. The next prime is 2181012221. The reversal of 2181012205 is 5022101812.

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

It is not a de Polignac number, because 2181012205 - 2¹ = 2181012203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181012203) 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, 4640217 + ... + 4640686.

It is an arithmetic number, because the mean of its divisors is an integer number (334112544).

Almost surely, 2^2181012205 is an apocalyptic number.

It is an amenable number.

2181012205 is a deficient number, since it is larger than the sum of its proper divisors (491888147).

2181012205 is an equidigital number, since it uses as much as digits as its factorization.

2181012205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280955.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 2181012205 is about 46701.3083863825. The cubic root of 2181012205 is about 1296.8389084493.

The spelling of 2181012205 in words is "two billion, one hundred eighty-one million, twelve thousand, two hundred five".