30121131209 has 8 divisors (see below), whose sum is σ = 32526533760. Its totient is φ = 27728356176.

The previous prime is 30121131203. The next prime is 30121131221. The reversal of 30121131209 is 90213112103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30121131209 - 2²⁸ = 29852695753 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 (30121131203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3151919 + ... + 3161460.

It is an arithmetic number, because the mean of its divisors is an integer number (4065816720).

Almost surely, 2^30121131209 is an apocalyptic number.

It is an amenable number.

30121131209 is a deficient number, since it is larger than the sum of its proper divisors (2405402551).

30121131209 is a wasteful number, since it uses less digits than its factorization.

30121131209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313759.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 30121131209 in words is "thirty billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred nine".