2121316 has 6 divisors (see below), whose sum is σ = 3712310. Its totient is φ = 1060656.

The previous prime is 2121289. The next prime is 2121323. The reversal of 2121316 is 6131212.

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 902500 = 1104^2 + 950^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2121316.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265161 + ... + 265168.

2^2121316 is an apocalyptic number.

It is an amenable number.

2121316 is a deficient number, since it is larger than the sum of its proper divisors (1590994).

2121316 is a wasteful number, since it uses less digits than its factorization.

2121316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530333 (or 530331 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 2121316 is about 1456.4738240010. The cubic root of 2121316 is about 128.4897416450.

Adding to 2121316 its reverse (6131212), we get a palindrome (8252528).

The spelling of 2121316 in words is "two million, one hundred twenty-one thousand, three hundred sixteen".