30121442551 has 16 divisors (see below), whose sum is σ = 31698321408. Its totient is φ = 28567123200.

The previous prime is 30121442531. The next prime is 30121442569. The reversal of 30121442551 is 15524412103.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30121442551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121442531) 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 15 ways as a sum of consecutive naturals, for example, 8881066 + ... + 8884456.

It is an arithmetic number, because the mean of its divisors is an integer number (1981145088).

Almost surely, 2^30121442551 is an apocalyptic number.

30121442551 is a deficient number, since it is larger than the sum of its proper divisors (1576878857).

30121442551 is a wasteful number, since it uses less digits than its factorization.

30121442551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 30121442551 its reverse (15524412103), we get a palindrome (45645854654).

The spelling of 30121442551 in words is "thirty billion, one hundred twenty-one million, four hundred forty-two thousand, five hundred fifty-one".