2121524605 has 16 divisors (see below), whose sum is σ = 2697589440. Its totient is φ = 1596195072.

The previous prime is 2121524599. The next prime is 2121524621. The reversal of 2121524605 is 5064251212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121524605 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115462 + ... + 132568.

It is an arithmetic number, because the mean of its divisors is an integer number (168599340).

Almost surely, 2^2121524605 is an apocalyptic number.

It is an amenable number.

2121524605 is a deficient number, since it is larger than the sum of its proper divisors (576064835).

2121524605 is a wasteful number, since it uses less digits than its factorization.

2121524605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18588.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 2121524605 is about 46060.0109096817. The cubic root of 2121524605 is about 1284.9395329539.

Adding to 2121524605 its reverse (5064251212), we get a palindrome (7185775817).

The spelling of 2121524605 in words is "two billion, one hundred twenty-one million, five hundred twenty-four thousand, six hundred five".