30003121997 has 4 divisors (see below), whose sum is σ = 30450929856. Its totient is φ = 29555314140.

The previous prime is 30003121987. The next prime is 30003122011. The reversal of 30003121997 is 79912130003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30003121997 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 (30003121927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223903829 + ... + 223903962.

It is an arithmetic number, because the mean of its divisors is an integer number (7612732464).

Almost surely, 2^30003121997 is an apocalyptic number.

It is an amenable number.

30003121997 is a deficient number, since it is larger than the sum of its proper divisors (447807859).

30003121997 is an equidigital number, since it uses as much as digits as its factorization.

30003121997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447807858.

The product of its (nonzero) digits is 10206, while the sum is 35.

The spelling of 30003121997 in words is "thirty billion, three million, one hundred twenty-one thousand, nine hundred ninety-seven".