2121641516 has 24 divisors (see below), whose sum is σ = 3786807024. Its totient is φ = 1039737920.

The previous prime is 2121641513. The next prime is 2121641539. The reversal of 2121641516 is 6151461212.

It is not an unprimeable number, because it can be changed into a prime (2121641513) 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, 226706 + ... + 235878.

It is an arithmetic number, because the mean of its divisors is an integer number (157783626).

Almost surely, 2^2121641516 is an apocalyptic number.

It is an amenable number.

2121641516 is a deficient number, since it is larger than the sum of its proper divisors (1665165508).

2121641516 is a wasteful number, since it uses less digits than its factorization.

2121641516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321 (or 10319 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 2121641516 is about 46061.2800082672. The cubic root of 2121641516 is about 1284.9631356036.

The spelling of 2121641516 in words is "two billion, one hundred twenty-one million, six hundred forty-one thousand, five hundred sixteen".