30121421 has 8 divisors (see below), whose sum is σ = 34288704. Its totient is φ = 26192320.

The previous prime is 30121411. The next prime is 30121453. The reversal of 30121421 is 12412103.

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

It is not a de Polignac number, because 30121421 - 2²² = 25927117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30121396 and 30121405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121411) 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, 59276 + ... + 59781.

It is an arithmetic number, because the mean of its divisors is an integer number (4286088).

Almost surely, 2^30121421 is an apocalyptic number.

It is an amenable number.

30121421 is a deficient number, since it is larger than the sum of its proper divisors (4167283).

30121421 is a wasteful number, since it uses less digits than its factorization.

30121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119091.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 30121421 is about 5488.2985523749. The cubic root of 30121421 is about 311.1418899490.

Adding to 30121421 its reverse (12412103), we get a palindrome (42533524).

The spelling of 30121421 in words is "thirty million, one hundred twenty-one thousand, four hundred twenty-one".