2121313404204 has 72 divisors (see below), whose sum is σ = 5549169203760. Its totient is φ = 682468440192.

The previous prime is 2121313404169. The next prime is 2121313404227. The reversal of 2121313404204 is 4024043131212.

2121313404204 is a `hidden beast` number, since 2 + 1 + 21 + 31 + 3 + 404 + 204 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2450802 + ... + 3201414.

Almost surely, 2^{2121313404204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121313404204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2774584601880).

2121313404204 is an abundant number, since it is smaller than the sum of its proper divisors (3427855799556).

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

2121313404204 is a wasteful number, since it uses less digits than its factorization.

2121313404204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753359 (or 753354 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 2121313404204 its reverse (4024043131212), we get a palindrome (6145356535416).

The spelling of 2121313404204 in words is "two trillion, one hundred twenty-one billion, three hundred thirteen million, four hundred four thousand, two hundred four".