30121512103 has 4 divisors (see below), whose sum is σ = 31431143088. Its totient is φ = 28811881120.

The previous prime is 30121512097. The next prime is 30121512133.

30121512103 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30121512103 - 2¹³ = 30121503911 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 (30121512133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654815458 + ... + 654815503.

It is an arithmetic number, because the mean of its divisors is an integer number (7857785772).

Almost surely, 2^30121512103 is an apocalyptic number.

30121512103 is a deficient number, since it is larger than the sum of its proper divisors (1309630985).

30121512103 is a wasteful number, since it uses less digits than its factorization.

30121512103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309630984.

The product of its (nonzero) digits is 180, while the sum is 19.

The spelling of 30121512103 in words is "thirty billion, one hundred twenty-one million, five hundred twelve thousand, one hundred three".