2121642025326 has 48 divisors (see below), whose sum is σ = 5123469920400. Its totient is φ = 630580909824.

The previous prime is 2121642025297. The next prime is 2121642025367. The reversal of 2121642025326 is 6235202461212.

2121642025326 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 642 + 0 + 2 + 5 + 3 + 2 + 6 = 666.

It is a super-2 number, since 2×2121642025326² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 182453941 + ... + 182465568.

It is an arithmetic number, because the mean of its divisors is an integer number (106738956675).

Almost surely, 2^{2121642025326} is an apocalyptic number.

2121642025326 is an abundant number, since it is smaller than the sum of its proper divisors (3001827895074).

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

2121642025326 is a wasteful number, since it uses less digits than its factorization.

2121642025326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364919553 (or 364919550 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 2121642025326 its reverse (6235202461212), we get a palindrome (8356844486538).

The spelling of 2121642025326 in words is "two trillion, one hundred twenty-one billion, six hundred forty-two million, twenty-five thousand, three hundred twenty-six".