2121186604 has 6 divisors (see below), whose sum is σ = 3712076564. Its totient is φ = 1060593300.

The previous prime is 2121186593. The next prime is 2121186631. The reversal of 2121186604 is 4066811212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265148322 + ... + 265148329.

Almost surely, 2^2121186604 is an apocalyptic number.

It is an amenable number.

2121186604 is a deficient number, since it is larger than the sum of its proper divisors (1590889960).

2121186604 is a wasteful number, since it uses less digits than its factorization.

2121186604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530296655 (or 530296653 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2121186604 is about 46056.3416263168. The cubic root of 2121186604 is about 1284.8712905347.

Adding to 2121186604 its reverse (4066811212), we get a palindrome (6187997816).

The spelling of 2121186604 in words is "two billion, one hundred twenty-one million, one hundred eighty-six thousand, six hundred four".