30121316 has 6 divisors (see below), whose sum is σ = 52712310. Its totient is φ = 15060656.

The previous prime is 30121307. The next prime is 30121319. The reversal of 30121316 is 61312103.

It can be written as a sum of positive squares in only one way, i.e., 29658916 + 462400 = 5446^2 + 680^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30121294 and 30121303.

It is not an unprimeable number, because it can be changed into a prime (30121319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3765161 + ... + 3765168.

It is an arithmetic number, because the mean of its divisors is an integer number (8785385).

Almost surely, 2^30121316 is an apocalyptic number.

It is an amenable number.

30121316 is a deficient number, since it is larger than the sum of its proper divisors (22590994).

30121316 is a wasteful number, since it uses less digits than its factorization.

30121316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7530333 (or 7530331 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 30121316 is about 5488.2889865604. The cubic root of 30121316 is about 311.1415284130.

Adding to 30121316 its reverse (61312103), we get a palindrome (91433419).

The spelling of 30121316 in words is "thirty million, one hundred twenty-one thousand, three hundred sixteen".