29221 has 2 divisors, whose sum is σ = 29222. Its totient is φ = 29220.

The previous prime is 29209. The next prime is 29231. The reversal of 29221 is 12292.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16900 + 12321 = 130^2 + 111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29195 and 29204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14610 + 14611.

It is an arithmetic number, because the mean of its divisors is an integer number (14611).

2²⁹²²¹ is an apocalyptic number.

It is an amenable number.

29221 is a deficient number, since it is larger than the sum of its proper divisors (1).

29221 is an equidigital number, since it uses as much as digits as its factorization.

29221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 16.

The square root of 29221 is about 170.9415104648. The cubic root of 29221 is about 30.8010147526.

It can be divided in two parts, 292 and 21, that added together give a palindrome (313).

The spelling of 29221 in words is "twenty-nine thousand, two hundred twenty-one".