236121 has 4 divisors (see below), whose sum is σ = 314832. Its totient is φ = 157412.

The previous prime is 236111. The next prime is 236129. The reversal of 236121 is 121632.

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 236121 - 2¹⁵ = 203353 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 236121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 236121.

It is not an unprimeable number, because it can be changed into a prime (236129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39351 + ... + 39356.

It is an arithmetic number, because the mean of its divisors is an integer number (78708).

2²³⁶¹²¹ is an apocalyptic number.

It is an amenable number.

236121 is a deficient number, since it is larger than the sum of its proper divisors (78711).

236121 is an equidigital number, since it uses as much as digits as its factorization.

236121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78710.

The product of its digits is 72, while the sum is 15.

The square root of 236121 is about 485.9228333800. The cubic root of 236121 is about 61.8080256855.

Adding to 236121 its reverse (121632), we get a palindrome (357753).

The spelling of 236121 in words is "two hundred thirty-six thousand, one hundred twenty-one".