2121621308 has 12 divisors (see below), whose sum is σ = 3715427520. Its totient is φ = 1060070592.

The previous prime is 2121621289. The next prime is 2121621317. The reversal of 2121621308 is 8031261212.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178541 + ... + 190052.

It is an arithmetic number, because the mean of its divisors is an integer number (309618960).

Almost surely, 2^2121621308 is an apocalyptic number.

It is an amenable number.

2121621308 is a deficient number, since it is larger than the sum of its proper divisors (1593806212).

2121621308 is a wasteful number, since it uses less digits than its factorization.

2121621308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370036 (or 370034 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2121621308 is about 46061.0606477966. The cubic root of 2121621308 is about 1284.9590559610.

It can be divided in two parts, 21216 and 21308, that added together give a palindrome (42524).

The spelling of 2121621308 in words is "two billion, one hundred twenty-one million, six hundred twenty-one thousand, three hundred eight".