30878411121 has 12 divisors (see below), whose sum is σ = 45333332980. Its totient is φ = 20248138080.

The previous prime is 30878411117. The next prime is 30878411131. The reversal of 30878411121 is 12111487803.

It can be written as a sum of positive squares in 2 ways, for example, as 405821025 + 30472590096 = 20145^2 + 174564^2 .

It is not a de Polignac number, because 30878411121 - 2² = 30878411117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30878411101) 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 11 ways as a sum of consecutive naturals, for example, 28121866 + ... + 28122963.

Almost surely, 2^30878411121 is an apocalyptic number.

It is an amenable number.

30878411121 is a deficient number, since it is larger than the sum of its proper divisors (14454921859).

30878411121 is a wasteful number, since it uses less digits than its factorization.

30878411121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56244896 (or 56244893 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

Adding to 30878411121 its reverse (12111487803), we get a palindrome (42989898924).

The spelling of 30878411121 in words is "thirty billion, eight hundred seventy-eight million, four hundred eleven thousand, one hundred twenty-one".