2121121212104 has 16 divisors (see below), whose sum is σ = 3977131708800. Its totient is φ = 1060552756432.

The previous prime is 2121121212103. The next prime is 2121121212137. The reversal of 2121121212104 is 4012121211212.

It is a super-2 number, since 2×2121121212104² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121121212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259517 + ... + 2075955.

It is an arithmetic number, because the mean of its divisors is an integer number (248570731800).

Almost surely, 2^{2121121212104} is an apocalyptic number.

It is an amenable number.

2121121212104 is a deficient number, since it is larger than the sum of its proper divisors (1856010496696).

2121121212104 is a wasteful number, since it uses less digits than its factorization.

2121121212104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962412 (or 1962408 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 2121121212104 its reverse (4012121211212), we get a palindrome (6133242423316).

The spelling of 2121121212104 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred four".