30121316865 has 96 divisors (see below), whose sum is σ = 55286614656. Its totient is φ = 15150136320.

The previous prime is 30121316857. The next prime is 30121316881. The reversal of 30121316865 is 56861312103.

It is not a de Polignac number, because 30121316865 - 2³ = 30121316857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11125842 + ... + 11128548.

It is an arithmetic number, because the mean of its divisors is an integer number (575902236).

Almost surely, 2^30121316865 is an apocalyptic number.

It is an amenable number.

30121316865 is a deficient number, since it is larger than the sum of its proper divisors (25165297791).

30121316865 is a wasteful number, since it uses less digits than its factorization.

30121316865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2959 (or 2956 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 30121316865 its reverse (56861312103), we get a palindrome (86982628968).

The spelling of 30121316865 in words is "thirty billion, one hundred twenty-one million, three hundred sixteen thousand, eight hundred sixty-five".