2102661205 has 8 divisors (see below), whose sum is σ = 2530224000. Its totient is φ = 1677441936.

The previous prime is 2102661199. The next prime is 2102661217. The reversal of 2102661205 is 5021662012.

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 2102661205 - 2¹³ = 2102653013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102661205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583905 + ... + 587494.

It is an arithmetic number, because the mean of its divisors is an integer number (316278000).

Almost surely, 2^2102661205 is an apocalyptic number.

It is an amenable number.

2102661205 is a deficient number, since it is larger than the sum of its proper divisors (427562795).

2102661205 is a wasteful number, since it uses less digits than its factorization.

2102661205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171763.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2102661205 is about 45854.7838834728. The cubic root of 2102661205 is about 1281.1198705674.

The spelling of 2102661205 in words is "two billion, one hundred two million, six hundred sixty-one thousand, two hundred five".