30002123421 has 12 divisors (see below), whose sum is σ = 43719909948. Its totient is φ = 19824411264.

The previous prime is 30002123407. The next prime is 30002123509. The reversal of 30002123421 is 12432120003.

30002123421 is a `hidden beast` number, since 30 + 0 + 0 + 212 + 3 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 516425625 + 29485697796 = 22725^2 + 171714^2 .

It is not a de Polignac number, because 30002123421 - 2⁷ = 30002123293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30002123394 and 30002123403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30002123401) 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 11 ways as a sum of consecutive naturals, for example, 14749290 + ... + 14751323.

It is an arithmetic number, because the mean of its divisors is an integer number (3643325829).

Almost surely, 2^30002123421 is an apocalyptic number.

It is an amenable number.

30002123421 is a deficient number, since it is larger than the sum of its proper divisors (13717786527).

30002123421 is a wasteful number, since it uses less digits than its factorization.

30002123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29500732 (or 29500729 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 30002123421 its reverse (12432120003), we get a palindrome (42434243424).

The spelling of 30002123421 in words is "thirty billion, two million, one hundred twenty-three thousand, four hundred twenty-one".