30210121 has 4 divisors (see below), whose sum is σ = 30427600. Its totient is φ = 29992644.

The previous prime is 30210043. The next prime is 30210127. The reversal of 30210121 is 12101203.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12101203 = 571 ⋅21193.

It is a cyclic number.

It is not a de Polignac number, because 30210121 - 2⁹ = 30209609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30210098 and 30210107.

It is not an unprimeable number, because it can be changed into a prime (30210127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108531 + ... + 108808.

It is an arithmetic number, because the mean of its divisors is an integer number (7606900).

Almost surely, 2^30210121 is an apocalyptic number.

It is an amenable number.

30210121 is a deficient number, since it is larger than the sum of its proper divisors (217479).

30210121 is a wasteful number, since it uses less digits than its factorization.

30210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217478.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 30210121 is about 5496.3734407334. The cubic root of 30210121 is about 311.4470021577.

Adding to 30210121 its reverse (12101203), we get a palindrome (42311324).

The spelling of 30210121 in words is "thirty million, two hundred ten thousand, one hundred twenty-one".