236421121 has 2 divisors, whose sum is σ = 236421122. Its totient is φ = 236421120.

The previous prime is 236421077. The next prime is 236421149. The reversal of 236421121 is 121124632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234702400 + 1718721 = 15320^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 236421121 - 2¹⁹ = 235896833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 236421092 and 236421101.

It is not a weakly prime, because it can be changed into another prime (236421191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118210560 + 118210561.

It is an arithmetic number, because the mean of its divisors is an integer number (118210561).

It is a Proth number, since it is equal to 7215 ⋅ 2¹⁵ + 1 and 7215 < 2¹⁵.

Almost surely, 2^236421121 is an apocalyptic number.

It is an amenable number.

236421121 is a deficient number, since it is larger than the sum of its proper divisors (1).

236421121 is an equidigital number, since it uses as much as digits as its factorization.

236421121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

The square root of 236421121 is about 15375.9917078542. The cubic root of 236421121 is about 618.3420157664.

Adding to 236421121 its reverse (121124632), we get a palindrome (357545753).

The spelling of 236421121 in words is "two hundred thirty-six million, four hundred twenty-one thousand, one hundred twenty-one".