2121331214404 has 24 divisors (see below), whose sum is σ = 3727182201120. Its totient is φ = 1056429014784.

The previous prime is 2121331214381. The next prime is 2121331214407. The reversal of 2121331214404 is 4044121331212.

It is a happy number.

It is a super-2 number, since 2×2121331214404² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121331214407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338427 + ... + 2087389.

It is an arithmetic number, because the mean of its divisors is an integer number (155299258380).

Almost surely, 2^{2121331214404} is an apocalyptic number.

It is an amenable number.

2121331214404 is a deficient number, since it is larger than the sum of its proper divisors (1605850986716).

2121331214404 is a wasteful number, since it uses less digits than its factorization.

2121331214404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750179 (or 1750177 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 2121331214404 its reverse (4044121331212), we get a palindrome (6165452545616).

The spelling of 2121331214404 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-one million, two hundred fourteen thousand, four hundred four".