141221 has 2 divisors, whose sum is σ = 141222. Its totient is φ = 141220.

The previous prime is 141209. The next prime is 141223. The reversal of 141221 is 122141.

141221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84100 + 57121 = 290^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 141221 - 2⁶ = 141157 is a prime.

Together with 141223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (141223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70610 + 70611.

It is an arithmetic number, because the mean of its divisors is an integer number (70611).

2¹⁴¹²²¹ is an apocalyptic number.

It is an amenable number.

141221 is a deficient number, since it is larger than the sum of its proper divisors (1).

141221 is an equidigital number, since it uses as much as digits as its factorization.

141221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16, while the sum is 11.

The square root of 141221 is about 375.7938264528. The cubic root of 141221 is about 52.0754575113.

Adding to 141221 its reverse (122141), we get a palindrome (263362).

The spelling of 141221 in words is "one hundred forty-one thousand, two hundred twenty-one", and thus it is an iban number.