230120021 has 4 divisors (see below), whose sum is σ = 230485344. Its totient is φ = 229754700.

The previous prime is 230119997. The next prime is 230120027. The reversal of 230120021 is 120021032.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 230120021 - 2¹⁰ = 230118997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230119984 and 230120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230120027) 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 3 ways as a sum of consecutive naturals, for example, 181715 + ... + 182976.

It is an arithmetic number, because the mean of its divisors is an integer number (57621336).

Almost surely, 2^230120021 is an apocalyptic number.

It is an amenable number.

230120021 is a deficient number, since it is larger than the sum of its proper divisors (365323).

230120021 is an equidigital number, since it uses as much as digits as its factorization.

230120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365322.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 230120021 is about 15169.7073472101. The cubic root of 230120021 is about 612.7991228667.

Adding to 230120021 its reverse (120021032), we get a palindrome (350141053).

It can be divided in two parts, 2301 and 20021, that added together give a palindrome (22322).

The spelling of 230120021 in words is "two hundred thirty million, one hundred twenty thousand, twenty-one".