201230121 has 32 divisors (see below), whose sum is σ = 289203840. Its totient is φ = 124084224.

The previous prime is 201230093. The next prime is 201230129. The reversal of 201230121 is 121032102.

It is not a de Polignac number, because 201230121 - 2¹⁰ = 201229097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201230097 and 201230106.

It is not an unprimeable number, because it can be changed into a prime (201230129) 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 31 ways as a sum of consecutive naturals, for example, 569881 + ... + 570233.

It is an arithmetic number, because the mean of its divisors is an integer number (9037620).

Almost surely, 2^201230121 is an apocalyptic number.

It is an amenable number.

201230121 is a deficient number, since it is larger than the sum of its proper divisors (87973719).

201230121 is a wasteful number, since it uses less digits than its factorization.

201230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 201230121 is about 14185.5602991211. The cubic root of 201230121 is about 586.0000630953. Note that the first 4 decimals are identical.

Adding to 201230121 its reverse (121032102), we get a palindrome (322262223).

The spelling of 201230121 in words is "two hundred one million, two hundred thirty thousand, one hundred twenty-one".