2121253236 has 36 divisors (see below), whose sum is σ = 5389020000. Its totient is φ = 703528848.

The previous prime is 2121253181. The next prime is 2121253247. The reversal of 2121253236 is 6323521212.

It is a happy number.

2121253236 is a `hidden beast` number, since 2 + 121 + 2 + 532 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 140886 + ... + 155213.

It is an arithmetic number, because the mean of its divisors is an integer number (149695000).

Almost surely, 2^2121253236 is an apocalyptic number.

It is an amenable number.

2121253236 is an abundant number, since it is smaller than the sum of its proper divisors (3267766764).

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

2121253236 is a wasteful number, since it uses less digits than its factorization.

2121253236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296308 (or 296303 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2121253236 is about 46057.0649955031. The cubic root of 2121253236 is about 1284.8847441126.

Adding to 2121253236 its reverse (6323521212), we get a palindrome (8444774448).

The spelling of 2121253236 in words is "two billion, one hundred twenty-one million, two hundred fifty-three thousand, two hundred thirty-six".