2121404466 has 16 divisors (see below), whose sum is σ = 4492386144. Its totient is φ = 665538624.

The previous prime is 2121404443. The next prime is 2121404477. The reversal of 2121404466 is 6644041212.

It is a happy 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, 10398940 + ... + 10399143.

It is an arithmetic number, because the mean of its divisors is an integer number (280774134).

Almost surely, 2^2121404466 is an apocalyptic number.

2121404466 is an abundant number, since it is smaller than the sum of its proper divisors (2370981678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121404466 is a wasteful number, since it uses less digits than its factorization.

2121404466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20798105.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 2121404466 is about 46058.7067339065. The cubic root of 2121404466 is about 1284.9152777140.

Adding to 2121404466 its reverse (6644041212), we get a palindrome (8765445678).

The spelling of 2121404466 in words is "two billion, one hundred twenty-one million, four hundred four thousand, four hundred sixty-six".