30020121999 has 36 divisors (see below), whose sum is σ = 53096829240. Its totient is φ = 16251490080.

The previous prime is 30020121997. The next prime is 30020122001. The reversal of 30020121999 is 99912102003.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30020121997) and next prime (30020122001).

It is not a de Polignac number, because 30020121999 - 2¹ = 30020121997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30020121997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1783012 + ... + 1799769.

Almost surely, 2^30020121999 is an apocalyptic number.

30020121999 is a deficient number, since it is larger than the sum of its proper divisors (23076707241).

30020121999 is a wasteful number, since it uses less digits than its factorization.

30020121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582820 (or 3582810 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The spelling of 30020121999 in words is "thirty billion, twenty million, one hundred twenty-one thousand, nine hundred ninety-nine".